diff --git a/dist/min/tiny-slider.helper.ie8.js b/dist/min/tiny-slider.helper.ie8.js
index 7462bbc3..e3a829c3 100644
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i=Dn;if(Fe)if(ft)i+=Nn,i+="px";else{var a=I?Nn*st*100/(qe*Et):100*Nn/qe;i+=a,i+="%"}else i+=Ln,i+="px";I&&ee(0),Xe.style[Dt]=Nt+i+Lt}}}function Me(e){if(e=e||k.event,An&&(An=!1),ot){ot=!1;var t=0===e.type.indexOf("touch")?e.changedTouches[0]:e;if(Nn=parseInt(t.clientX)-Mn,Ln=parseInt(t.clientY)-kn,Mn=kn=null,Fe){var n=-Nn*st/qe;n=Nn>0?Math.floor(n):Math.ceil(n),St+=n}else{var i=-(Dn+Ln);if(i<=0)St=Ot;else if(i>=at[at.length-1])St=At;else{var a=0;do{a++,St=Ln<0?a+1:a}while(a<Et&&i>=at[a+1])}}0===e.type.indexOf("touch")?It.emit("touchEnd",Pe(e)):It.emit("dragEnd",Pe(e)),re()}if(Pn){Pn=!1;var r=we(e);De(r)&&g(r,{click:function e(t){Ne(t),b(r,{click:e})}})}}function ke(){Ve.style.height=at[St+st]-at[St]+"px"}function Oe(){ln=[];for(var e=!mt&&dt?St-1:St,t=e%Qe%st;t<Qe;)!mt&&t+st>Qe&&(t=Qe-st),ln.push(t),t+=st;(mt&&ln.length*st<Qe||!mt&&ln[0]>0)&&ln.unshift(0)}function Ae(){on&&!t.navContainer&&(Oe(),ln!==cn&&(cn.length>0&&cn.forEach(function(e){u(rn[e],{hidden:""})}),ln.length>0&&ln.forEach(function(e){d(rn[e],"hidden")}),cn=ln))}function Pe(e){return{container:Xe,slideItems:Ye,navContainer:sn,navItems:rn,controlsContainer:an,prevButton:Zt,nextButton:en,items:st,slideBy:lt,cloneCount:Tt,slideCount:Qe,slideCountNew:Et,index:St,indexCached:Mt,navCurrent:dn,navCurrentCached:fn,visibleNavIndexes:ln,visibleNavIndexesCached:cn,event:e||{}}}if(t=e({container:M.querySelector(".slider"),mode:"carousel",axis:"horizontal",items:1,gutter:0,edgePadding:0,fixedWidth:!1,slideBy:1,controls:!0,controlsText:["prev","next"],controlsContainer:!1,nav:!0,navContainer:!1,arrowKeys:!1,speed:300,autoplay:!1,autoplayTimeout:5e3,autoplayDirection:"forward",autoplayText:["start","stop"],autoplayHoverPause:!1,autoplayButton:!1,autoplayResetOnVisibility:!0,loop:!0,rewind:!1,autoHeight:!1,responsive:!1,lazyload:!1,touch:!0,mouseDrag:!1,nested:!1,onInit:!1},t||{}),["container","controlsContainer","navContainer","autoplayButton"].forEach(function(e){"string"==typeof t[e]&&(t[e]=M.querySelector(t[e]))}),t.container&&t.container.nodeName&&!(t.container.children.length<2)){if(t.responsive){var We={},Ie=t.responsive;for(var He in Ie){var Re=Ie[He];We[He]="number"==typeof Re?{items:Re}:Re}t.responsive=We,We=null}var ze="carousel"===t.mode;if(!ze){t.axis="horizontal",t.rewind=!1,t.loop=!0;var Be="tns-fadeIn",je="tns-fadeOut",Ge=!1,_e=t.animateNormal||"tns-normal";j&&G&&(Be=t.animateIn||Be,je=t.animateOut||je,Ge=t.animateDelay||Ge)}var qe,Fe="horizontal"===t.axis,Ue=M.createElement("div"),Ve=M.createElement("div"),Xe=t.container,Ke=Xe.parentNode,Ye=Xe.children,Qe=Ye.length,Je=Ke.clientWidth,$e=t.responsive,Ze=[],et=!1,tt=0,nt=0;if($e){et=Object.keys($e).map(function(e){return Number(e)}).sort(function(e,t){return e-t}),et.indexOf(0)<0&&(nt=1),et.forEach(function(e){Ze=Ze.concat(Object.keys($e[e]))});var it=[];Ze.forEach(function(e){it.indexOf(e)<0&&it.push(e)}),Ze=it,tt=_()}var at,rt,ot,st=c("items"),lt="page"===c("slideBy")?st:c("slideBy"),ct=t.nested,ut=c("gutter"),dt=c("edgePadding"),ft=c("fixedWidth"),ht=c("arrowKeys"),vt=c("speed"),pt=t.rewind,mt=!pt&&t.loop,yt=c("autoHeight"),gt=a(),bt=t.lazyload,xt=[],Tt=mt?2*Qe:n("edgePadding")?1:0,Et=ze?Qe+2*Tt:Qe+Tt,Ct=!(!ft||mt||dt),wt=!ze||!mt,Dt=Fe?"left":"top",Nt="",Lt="",St=ze?Tt:0,Mt=St,kt=!mt&&n("edgePadding")?1:0,Ot=kt,At=Et-st-kt,Pt=!1,Wt=t.onInit,It=new x,Ht=Xe.id,Rt=Xe.className,zt=Ye[0].id,Bt=Ye[0].className,jt=Xe.id||i(),Gt=Qe<=st,_t="inner"===ct?" !important":"",qt={mouseover:q,mouseout:F},Ft={visibilitychange:ge},Ut={keydown:be},Vt={touchstart:Le,touchmove:Se,touchend:Me,touchcancel:Me},Xt={mousedown:Le,mousemove:Se,mouseup:Me,mouseleave:Me},Kt=n("controls"),Yt=n("nav"),Qt=n("autoplay"),Jt=n("touch"),$t=n("mouseDrag");if(Kt)var Zt,en,tn=c("controls"),nn=c("controlsText"),an=t.controlsContainer;if(Yt)var rn,on=c("nav"),sn=t.navContainer,ln=[],cn=ln,un=-1,dn=0,fn=0;if(Qt)var hn,vn=c("autoplay"),pn=c("autoplayTimeout"),mn="forward"===t.autoplayDirection?1:-1,yn=c("autoplayText"),gn=c("autoplayHoverPause"),bn=t.autoplayButton,xn=!1,Tn=!1,En=["<span class='tns-visually-hidden'>"," animation</span>"],Cn=c("autoplayResetOnVisibility"),wn=!1;if(Jt)var Dn,Nn,Ln,Sn=c("touch"),Mn=null,kn=null;if($t)var On=c("mouseDrag"),An=!1,Pn=!1;Gt&&(tn=on=Sn=On=ht=vn=gn=Cn=!1),I&&(Dt=I,Nt="translate",Nt+=Fe?"X(":"Y(",Lt=")"),function(){Ue.appendChild(Ve),Ke.insertBefore(Ue,Xe),Ve.appendChild(Xe),qe=Ve.clientWidth;var e="tns-outer",i="tns-inner",a=" tns-slider tns-"+t.mode;if(ze&&(Fe&&(n("edgePadding")||n("gutter")&&!t.fixedWidth)?e+=" tns-ovh":i+=" tns-ovh"),Ue.className=e,Ve.className=i,Ve.id=jt+"-iw",yt&&(Ve.className+=" tns-ah",Ve.style[H]=vt/1e3+"s"),""===Xe.id&&(Xe.id=jt),a+=P?" tns-subpixel":" tns-no-subpixel",a+=A?" tns-calc":" tns-no-calc",ze&&(a+=" tns-"+t.axis),Xe.className+=a,ze&&j){var r={};r[j]=oe,g(Xe,r)}e=i=a=null;for(var o=0;o<Qe;o++){var s=Ye[o];s.id=jt+"-item"+o,s.classList.add("tns-item"),!ze&&_e&&s.classList.add(_e),u(s,{"aria-hidden":"true",tabindex:"-1"})}if(mt||dt){for(var l=M.createDocumentFragment(),f=M.createDocumentFragment(),v=Tt;v--;){var p=v%Qe,b=Ye[p].cloneNode(!0);if(d(b,"id"),f.insertBefore(b,f.firstChild),ze){var x=Ye[Qe-1-p].cloneNode(!0);d(x,"id"),l.appendChild(x)}}Xe.insertBefore(l,Xe.firstChild),Xe.appendChild(f),Ye=Xe.children}for(var T=St;T<St+st;T++){var s=Ye[T];u(s,{"aria-hidden":"false"}),d(s,["tabindex"]),ze||(s.style.left=100*(T-St)/st+"%",s.classList.remove(_e),s.classList.add(Be))}if(ze&&Fe)if(P){var O=k.getComputedStyle(Ye[0]).fontSize;O.indexOf("em")!==-1&&(O=16*Number(O.replace(/r?em/,""))+"px"),E(gt,"#"+jt,"font-size:0;",C(gt)),E(gt,"#"+jt+" .tns-item","font-size:"+O+";",C(gt))}else[].forEach.call(Ye,function(e,t){e.style.marginLeft=m(t)});if(W){var I=y(t.edgePadding,t.gutter,t.fixedWidth);E(gt,"#"+jt+"-iw",I,C(gt)),ze&&Fe&&(I="width:"+w(t.fixedWidth,t.gutter,t.items),E(gt,"#"+jt,I,C(gt))),(Fe||t.gutter)&&(I=D(t.fixedWidth,t.gutter,t.items)+N(t.gutter),E(gt,"#"+jt+" .tns-item",I,C(gt)))}else if(Ve.style.cssText=y(dt,ut,ft),ze&&Fe&&(Xe.style.width=w(ft,ut,st)),Fe||ut){var I=D(ft,ut,st)+N(ut);E(gt,"#"+jt+" .tns-item",I,C(gt))}if(Fe||(Y(),ke()),$e&&W&&et.forEach(function(e){var t=$e[e],i=innerWrapperStr=containerStr=slideStr="",a=c("items",e),r=c("fixedWidth",e),o=c("edgePadding",e),s=c("gutter",e);("edgePadding"in t||"gutter"in t)&&(innerWrapperStr="#"+jt+"-iw{"+y(o,s,r)+"}"),ze&&Fe&&("fixedWidth"in t||"gutter"in t||"items"in t)&&(containerStr="#"+jt+"{width:"+w(r,s,a)+"}"),("fixedWidth"in t||n("fixedWidth")&&"gutter"in t)&&(slideStr+=D(r,s,a)),"gutter"in t&&(slideStr+=N(s)),slideStr.length>0&&(slideStr="#"+jt+" .tns-item{"+slideStr+"}"),i=innerWrapperStr+containerStr+slideStr,i.length>0&&gt.insertRule("@media (min-width: "+e/16+"em) {"+i+"}",gt.cssRules.length)}),ze&&ne(),navigator.msMaxTouchPoints&&(Ue.classList.add("ms-touch"),g(Ue,{scroll:Ce}),Q()),Yt){if(sn)u(sn,{"aria-label":"Carousel Pagination"}),rn=sn.children,[].forEach.call(rn,function(e,t){u(e,{"data-nav":t,tabindex:"-1","aria-selected":"false","aria-controls":jt+"-item"+t})});else{for(var R="",T=0;T<Qe;T++)R+='<button data-nav="'+T+'" tabindex="-1" aria-selected="false" aria-controls="'+jt+"-item"+T+'" hidden type="button"></button>';R='<div class="tns-nav" aria-label="Carousel Pagination">'+R+"</div>",Ue.insertAdjacentHTML("afterbegin",R),[].forEach.call(Ue.children,function(e){e.classList.contains("tns-nav")&&(sn=e)}),rn=sn.children,Ae()}u(rn[0],{tabindex:"0","aria-selected":"true"});for(var z=0;z<Qe;z++)g(rn[z],{click:de,keydown:Ee});on||h(sn)}if(Qt){var B=vn?"stop":"start";bn?u(bn,{"data-action":B}):(Ve.insertAdjacentHTML("beforebegin",'<button data-action="'+B+'" type="button">'+En[0]+B+En[1]+yn[0]+"</button>"),bn=Ue.querySelector("[data-action]")),g(bn,{click:ye}),vn?(he(),gn&&g(Xe,qt),Cn&&g(Xe,Ft)):h(bn)}Kt&&(an?(Zt=an.children[0],en=an.children[1],u(an,{"aria-label":"Carousel Navigation",tabindex:"0"}),u(Zt,{"data-controls":"prev"}),u(en,{"data-controls":"next"}),u(an.children,{"aria-controls":jt,tabindex:"-1"})):(Ue.insertAdjacentHTML("afterbegin",'<div class="tns-controls" aria-label="Carousel Navigation" tabindex="0"><button data-controls="prev" tabindex="-1" aria-controls="'+jt+'" type="button">'+nn[0]+'</button><button data-controls="next" tabindex="-1" aria-controls="'+jt+'" type="button">'+nn[1]+"</button></div>"),[].forEach.call(Ue.children,function(e){e.classList.contains("tns-controls")&&(an=e)}),Zt=an.children[0],en=an.children[1]),mt||(Zt.disabled=!0),g(an,{keydown:xe}),g(Zt,{click:ce}),g(en,{click:ue}),tn||h(an)),Sn&&g(Xe,Vt),On&&g(Xe,Xt),ht&&g(M,Ut),"inner"===ct?It.on("outerResized",function(){S(),It.emit("innerLoaded",Pe())}):(g(k,{resize:L}),"outer"===ct&&It.on("innerLoaded",V)),U(),V(),"function"==typeof Wt&&Wt(Pe()),"inner"===ct&&It.emit("innerLoaded",Pe())}();var Wn=function(){return mt?function(){var e=Ot,t=At;ze&&(e+=lt,t-=lt);var n=ut?ut:0;if(ft&&Je%(ft+n)>n&&(t-=1),St>t)for(;St>=e+Qe;)St-=Qe;else if(St<e)for(;St<=t-Qe;)St+=Qe}:function(){St=Math.max(Ot,Math.min(At,St))}}(),In=function(){return ze?function(e,t){if(t||(t=te()),Ct&&St===At){var n=I?100*-((Et-st)/Et):100*-(Et/st-1);t=Math.max(Number(t.replace("%","")),n)+"%"}H||!e?(ne(t),0===vt&&oe()):T(Xe,Dt,Nt,Lt,t,vt,oe),Fe||ke()}:function(){xt=[];var e={};e[j]=e[G]=oe,b(Ye[Mt],e),g(Ye[St],e),ie(Mt,Be,je,!0),ie(St,_e,Be),j&&G&&0!==vt||setTimeout(oe,0)}}();return{getInfo:Pe,events:It,goTo:se,destroy:function(){if(gt.disabled=!0,Ke.insertBefore(Xe,Ue),Ue.remove(),Ue=Ve=null,Xe.id=Ht||"",Xe.className=Rt||"",d(Xe,["style"]),mt)for(var e=Tt;e--;)Ye[0].remove(),Ye[Ye.length-1].remove();for(var n=Qe;n--;)Ye[n].id=zt||"",Ye[n].className=Bt||"";d(Ye,["style","aria-hidden","tabindex"]),jt=Qe=null,tn&&(t.controlsContainer?(d(an,["aria-label","tabindex"]),d(an.children,["aria-controls","tabindex"]),f(an)):an=Zt=en=null),on&&(t.navContainer?(d(sn,["aria-label"]),d(rn,["aria-selected","aria-controls","tabindex"]),f(sn)):sn=null,rn=null),vn&&(t.navContainer?f(bn):sn=null,b(M,{visibilitychange:ge})),f(Xe),ht&&b(M,{keydown:be}),b(k,{resize:L})}}}}}();
 //# sourceMappingURL=../sourcemaps/tiny-slider.js.map
diff --git a/dist/tiny-slider.helper.ie8.js b/dist/tiny-slider.helper.ie8.js
index 7fb1aa7a..925dddd0 100644
--- a/dist/tiny-slider.helper.ie8.js
+++ b/dist/tiny-slider.helper.ie8.js
@@ -18,6 +18,25 @@ if (!Array.prototype.forEach) {
   };
 }
 
+// map
+// https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/map
+if (!Array.prototype.map) {
+    Array.prototype.map = function(fun /*, thisp*/) {
+        var len = this.length >>> 0;
+        if (typeof fun != "function")
+          throw new TypeError();
+
+        var res = new Array(len);
+        var thisp = arguments[1];
+        for (var i = 0; i < len; i++) {
+            if (i in this)
+                res[i] = fun.call(thisp, this[i], i, this);
+        }
+
+        return res;
+    };
+}
+
 // Filter
 
 if (!Array.prototype.filter) {
diff --git a/dist/tiny-slider.js b/dist/tiny-slider.js
index b48de4fe..73eaeba9 100644
--- a/dist/tiny-slider.js
+++ b/dist/tiny-slider.js
@@ -894,7 +894,9 @@ var tns = function(options) {
       breakpointZoneAdjust = 0;
 
   if (responsive) {
-    breakpoints = Object.keys(responsive).sort(function (a, b) { return a - b; });
+    breakpoints = Object.keys(responsive)
+      .map(function (x) { return Number(x); })
+      .sort(function (a, b) { return a - b; });
     if (breakpoints.indexOf(0) < 0) { breakpointZoneAdjust = 1; }
 
     breakpoints.forEach(function(bp) {
@@ -1111,45 +1113,51 @@ var tns = function(options) {
 
   function getContainerWidth(fixedWidthTem, gutterTem, itemsTem) {
     itemsTem = Math.min(slideCount, itemsTem);
-    var widthStr;
+    var str;
 
     if (fixedWidthTem) {
-      widthStr = (fixedWidthTem + Number(gutterTem)) * slideCountNew + 'px';
+      str = (fixedWidthTem + Number(gutterTem)) * slideCountNew + 'px';
     } else {
-      widthStr = CALC ? 
+      str = CALC ? 
         CALC + '(' + slideCountNew * 100 + '% / ' + itemsTem + ')' : 
         slideCountNew * 100 / itemsTem + '%';
     }
 
-    return widthStr;
+    return str;
   }
 
-  function getSlideStyles(fixedWidthTem, gutterTem, itemsTem) {
+  function getSlideWidthStyle(fixedWidthTem, gutterTem, itemsTem) {
     itemsTem = Math.min(slideCount, itemsTem);
-    var widthStr = gutterStr = '';
+    var str = '';
 
     if (horizontal) {
-      widthStr = 'width:';
+      str = 'width:';
       if (fixedWidthTem) {
-        widthStr += (fixedWidthTem + Number(gutterTem)) + 'px';
+        str += (fixedWidthTem + Number(gutterTem)) + 'px';
       } else {
         var dividend = carousel ? slideCountNew : Math.min(slideCount, itemsTem);
-        widthStr += CALC ? 
+        str += CALC ? 
           CALC + '(100% / ' + dividend + ')' : 
           100 / dividend + '%';
       }
-      widthStr += importantStr + ';';
+      str += importantStr + ';';
     }
 
+    return str;
+  }
+
+  function getSlideGutterStyle(gutterTem) {
+    var str = '';
+
     // gutter maybe interger || 0
     // so can't use 'if (gutter)'
     if (gutterTem !== false) {
       var prop = horizontal ? 'padding-' : 'margin-',
           dir = horizontal ? 'right' : 'bottom';
-      gutterStr = prop +  dir + ': ' + gutterTem + 'px;';
+      str = prop +  dir + ': ' + gutterTem + 'px;';
     }
 
-    return widthStr + gutterStr;
+    return str;
   }
 
   (function sliderInit() {
@@ -1269,7 +1277,6 @@ var tns = function(options) {
 
       // slide left margin
       // for IE8 & webkit browsers (no subpixel)
-      // run once
       } else {
         [].forEach.call(slideItems, function (slide, i) {
           slide.style.marginLeft = getSlideMarginLeft(i);
@@ -1290,7 +1297,8 @@ var tns = function(options) {
 
       // slide styles
       if (horizontal || options.gutter) {
-        str = getSlideStyles(options.fixedWidth, options.gutter, options.items);
+        str = getSlideWidthStyle(options.fixedWidth, options.gutter, options.items) + 
+              getSlideGutterStyle(options.gutter);
         addCSSRule(sheet, '#' + slideId + ' .tns-item', str, getCssRulesLength(sheet));
       }
 
@@ -1309,7 +1317,8 @@ var tns = function(options) {
 
       // slide styles
       if (horizontal || gutter) {
-        var str = getSlideStyles(fixedWidth, gutter, items);
+        var str = getSlideWidthStyle(fixedWidth, gutter, items) +
+                  getSlideGutterStyle(gutter);
         // append to the last line
         addCSSRule(sheet, '#' + slideId + ' .tns-item', str, getCssRulesLength(sheet));
       }
@@ -1330,21 +1339,27 @@ var tns = function(options) {
             edgePaddingBP = getOption('edgePadding', bp),
             gutterBP = getOption('gutter', bp);
 
+        // inner wrapper string
         if ('edgePadding' in opts || 'gutter' in opts) {
           innerWrapperStr = '#' + slideId + '-iw{' + getInnerWrapperStyles(edgePaddingBP, gutterBP, fixedWidthBP) + '}';
         }
 
-        if ('fixedWidth' in opts || 'gutter' in opts || 'items' in opts) {
-          if (carousel && horizontal) {
-            containerStr = '#' + slideId + '{' + 'width:' + getContainerWidth(fixedWidthBP, gutterBP, itemsBP) + '}';
-          }
+        // container string
+        if (carousel && horizontal && ('fixedWidth' in opts || 'gutter' in opts || 'items' in opts)) {
+          containerStr = '#' + slideId + '{' + 'width:' + getContainerWidth(fixedWidthBP, gutterBP, itemsBP) + '}';
+        }
 
-          if (horizontal || 'gutter' in opts) {
-            slideStr = '#' + slideId + ' .tns-item{' + getSlideStyles(fixedWidthBP, gutterBP, itemsBP) + '}';
-          }
+        // slide string
+        if ('fixedWidth' in opts || checkOption('fixedWidth') && 'gutter' in opts) {
+          slideStr += getSlideWidthStyle(fixedWidthBP, gutterBP, itemsBP);
+        }
+        if ('gutter' in opts) {
+          slideStr += getSlideGutterStyle(gutterBP);
         }
+        if (slideStr.length > 0) { slideStr = '#' + slideId + ' .tns-item{' + slideStr + '}'; }
 
         str = innerWrapperStr + containerStr + slideStr;
+
         if (str.length > 0) {
           sheet.insertRule('@media (min-width: ' + bp / 16 + 'em) {' + str + '}', sheet.cssRules.length);
         }
@@ -1706,25 +1721,28 @@ var tns = function(options) {
       // set inline styles for inner wrapper & container
       // insert stylesheet (one line) for slides only (since slides are many)
       if (!CSSMQ) {
+        // inner wrapper styles
         if (edgePadding !== edgePaddingTem || gutter !== gutterTem) {
-          // inner wrapper styles
           innerWrapper.style.cssText = getInnerWrapperStyles(edgePadding, gutter, fixedWidth);
         }
 
-        if (fixedWidth !== fixedWidthTem || gutter !== gutterTem || items !== itemsTem) {
-          if (carousel && horizontal) {
-            // container styles
-            container.style.width = getContainerWidth(fixedWidth, gutter, items);
-          }
+        // container styles
+        if (carousel && horizontal && (fixedWidth !== fixedWidthTem || gutter !== gutterTem || items !== itemsTem)) {
+          container.style.width = getContainerWidth(fixedWidth, gutter, items);
+        }
 
-          // slide styles
-          if (horizontal || gutter !== gutterTem) {
-            str = getSlideStyles(fixedWidth, gutter, items);
-            // remove the last line and
-            // add it again
-            sheet.removeRule(getCssRulesLength(sheet) - 1);
-            addCSSRule(sheet, '#' + slideId + ' .tns-item', str, getCssRulesLength(sheet));
-          }
+        // slide styles
+        // always need to get width property
+        var str = getSlideWidthStyle(fixedWidth, gutter, items);
+        if (gutter !== gutterTem) {
+          str += getSlideGutterStyle(gutter);
+        }
+
+        // remove the last line and
+        // add it again
+        if (str.length > 0) {
+          sheet.removeRule(getCssRulesLength(sheet) - 1);
+          addCSSRule(sheet, '#' + slideId + ' .tns-item', str, getCssRulesLength(sheet));
         }
 
         if (!fixedWidth) { doTransform(0); }
@@ -1767,7 +1785,6 @@ var tns = function(options) {
     }
     // auto height
     runAutoHeight();
-    
   }
 
 
diff --git a/src/tiny-slider.helper.ie8.js b/src/tiny-slider.helper.ie8.js
index 6d2bc49e..74fa7764 100644
--- a/src/tiny-slider.helper.ie8.js
+++ b/src/tiny-slider.helper.ie8.js
@@ -1,5 +1,6 @@
 import "../bower_components/go-native/src/es5/array/isArray.js";
 import "../bower_components/go-native/src/es5/array/forEach.js";
+import "../bower_components/go-native/src/es5/array/map.js";
 import "../bower_components/go-native/src/es5/array/filter.js";
 import "../bower_components/go-native/src/es5/array/indexOf.js";
 import "../bower_components/go-native/src/ie8/addEventListener.js";
diff --git a/src/tiny-slider.js b/src/tiny-slider.js
index d5a03d6b..3a21dee5 100644
--- a/src/tiny-slider.js
+++ b/src/tiny-slider.js
@@ -215,7 +215,9 @@ export var tns = function(options) {
       breakpointZoneAdjust = 0;
 
   if (responsive) {
-    breakpoints = Object.keys(responsive).sort(function (a, b) { return a - b; });
+    breakpoints = Object.keys(responsive)
+      .map(function (x) { return Number(x); })
+      .sort(function (a, b) { return a - b; });
     if (breakpoints.indexOf(0) < 0) { breakpointZoneAdjust = 1; }
 
     breakpoints.forEach(function(bp) {
@@ -432,45 +434,51 @@ export var tns = function(options) {
 
   function getContainerWidth(fixedWidthTem, gutterTem, itemsTem) {
     itemsTem = Math.min(slideCount, itemsTem);
-    var widthStr;
+    var str;
 
     if (fixedWidthTem) {
-      widthStr = (fixedWidthTem + Number(gutterTem)) * slideCountNew + 'px';
+      str = (fixedWidthTem + Number(gutterTem)) * slideCountNew + 'px';
     } else {
-      widthStr = CALC ? 
+      str = CALC ? 
         CALC + '(' + slideCountNew * 100 + '% / ' + itemsTem + ')' : 
         slideCountNew * 100 / itemsTem + '%';
     }
 
-    return widthStr;
+    return str;
   }
 
-  function getSlideStyles(fixedWidthTem, gutterTem, itemsTem) {
+  function getSlideWidthStyle(fixedWidthTem, gutterTem, itemsTem) {
     itemsTem = Math.min(slideCount, itemsTem);
-    var widthStr = gutterStr = '';
+    var str = '';
 
     if (horizontal) {
-      widthStr = 'width:';
+      str = 'width:';
       if (fixedWidthTem) {
-        widthStr += (fixedWidthTem + Number(gutterTem)) + 'px';
+        str += (fixedWidthTem + Number(gutterTem)) + 'px';
       } else {
         var dividend = carousel ? slideCountNew : Math.min(slideCount, itemsTem);
-        widthStr += CALC ? 
+        str += CALC ? 
           CALC + '(100% / ' + dividend + ')' : 
           100 / dividend + '%';
       }
-      widthStr += importantStr + ';';
+      str += importantStr + ';';
     }
 
+    return str;
+  }
+
+  function getSlideGutterStyle(gutterTem) {
+    var str = '';
+
     // gutter maybe interger || 0
     // so can't use 'if (gutter)'
     if (gutterTem !== false) {
       var prop = horizontal ? 'padding-' : 'margin-',
           dir = horizontal ? 'right' : 'bottom';
-      gutterStr = prop +  dir + ': ' + gutterTem + 'px;';
+      str = prop +  dir + ': ' + gutterTem + 'px;';
     }
 
-    return widthStr + gutterStr;
+    return str;
   }
 
   (function sliderInit() {
@@ -590,7 +598,6 @@ export var tns = function(options) {
 
       // slide left margin
       // for IE8 & webkit browsers (no subpixel)
-      // run once
       } else {
         [].forEach.call(slideItems, function (slide, i) {
           slide.style.marginLeft = getSlideMarginLeft(i);
@@ -611,7 +618,8 @@ export var tns = function(options) {
 
       // slide styles
       if (horizontal || options.gutter) {
-        str = getSlideStyles(options.fixedWidth, options.gutter, options.items);
+        str = getSlideWidthStyle(options.fixedWidth, options.gutter, options.items) + 
+              getSlideGutterStyle(options.gutter);
         addCSSRule(sheet, '#' + slideId + ' .tns-item', str, getCssRulesLength(sheet));
       }
 
@@ -630,7 +638,8 @@ export var tns = function(options) {
 
       // slide styles
       if (horizontal || gutter) {
-        var str = getSlideStyles(fixedWidth, gutter, items);
+        var str = getSlideWidthStyle(fixedWidth, gutter, items) +
+                  getSlideGutterStyle(gutter);
         // append to the last line
         addCSSRule(sheet, '#' + slideId + ' .tns-item', str, getCssRulesLength(sheet));
       }
@@ -651,21 +660,27 @@ export var tns = function(options) {
             edgePaddingBP = getOption('edgePadding', bp),
             gutterBP = getOption('gutter', bp);
 
+        // inner wrapper string
         if ('edgePadding' in opts || 'gutter' in opts) {
           innerWrapperStr = '#' + slideId + '-iw{' + getInnerWrapperStyles(edgePaddingBP, gutterBP, fixedWidthBP) + '}';
         }
 
-        if ('fixedWidth' in opts || 'gutter' in opts || 'items' in opts) {
-          if (carousel && horizontal) {
-            containerStr = '#' + slideId + '{' + 'width:' + getContainerWidth(fixedWidthBP, gutterBP, itemsBP) + '}';
-          }
+        // container string
+        if (carousel && horizontal && ('fixedWidth' in opts || 'gutter' in opts || 'items' in opts)) {
+          containerStr = '#' + slideId + '{' + 'width:' + getContainerWidth(fixedWidthBP, gutterBP, itemsBP) + '}';
+        }
 
-          if (horizontal || 'gutter' in opts) {
-            slideStr = '#' + slideId + ' .tns-item{' + getSlideStyles(fixedWidthBP, gutterBP, itemsBP) + '}';
-          }
+        // slide string
+        if ('fixedWidth' in opts || checkOption('fixedWidth') && 'gutter' in opts) {
+          slideStr += getSlideWidthStyle(fixedWidthBP, gutterBP, itemsBP);
+        }
+        if ('gutter' in opts) {
+          slideStr += getSlideGutterStyle(gutterBP);
         }
+        if (slideStr.length > 0) { slideStr = '#' + slideId + ' .tns-item{' + slideStr + '}'; }
 
         str = innerWrapperStr + containerStr + slideStr;
+
         if (str.length > 0) {
           sheet.insertRule('@media (min-width: ' + bp / 16 + 'em) {' + str + '}', sheet.cssRules.length);
         }
@@ -1027,25 +1042,28 @@ export var tns = function(options) {
       // set inline styles for inner wrapper & container
       // insert stylesheet (one line) for slides only (since slides are many)
       if (!CSSMQ) {
+        // inner wrapper styles
         if (edgePadding !== edgePaddingTem || gutter !== gutterTem) {
-          // inner wrapper styles
           innerWrapper.style.cssText = getInnerWrapperStyles(edgePadding, gutter, fixedWidth);
         }
 
-        if (fixedWidth !== fixedWidthTem || gutter !== gutterTem || items !== itemsTem) {
-          if (carousel && horizontal) {
-            // container styles
-            container.style.width = getContainerWidth(fixedWidth, gutter, items);
-          }
+        // container styles
+        if (carousel && horizontal && (fixedWidth !== fixedWidthTem || gutter !== gutterTem || items !== itemsTem)) {
+          container.style.width = getContainerWidth(fixedWidth, gutter, items);
+        }
 
-          // slide styles
-          if (horizontal || gutter !== gutterTem) {
-            str = getSlideStyles(fixedWidth, gutter, items);
-            // remove the last line and
-            // add it again
-            sheet.removeRule(getCssRulesLength(sheet) - 1);
-            addCSSRule(sheet, '#' + slideId + ' .tns-item', str, getCssRulesLength(sheet));
-          }
+        // slide styles
+        // always need to get width property
+        var str = getSlideWidthStyle(fixedWidth, gutter, items);
+        if (gutter !== gutterTem) {
+          str += getSlideGutterStyle(gutter);
+        }
+
+        // remove the last line and
+        // add it again
+        if (str.length > 0) {
+          sheet.removeRule(getCssRulesLength(sheet) - 1);
+          addCSSRule(sheet, '#' + slideId + ' .tns-item', str, getCssRulesLength(sheet));
         }
 
         if (!fixedWidth) { doTransform(0); }
@@ -1088,7 +1106,6 @@ export var tns = function(options) {
     }
     // auto height
     runAutoHeight();
-    
   }
 
 
diff --git a/src/tiny-slider.module.js b/src/tiny-slider.module.js
index c8e15a88..86554c4c 100644
--- a/src/tiny-slider.module.js
+++ b/src/tiny-slider.module.js
@@ -215,7 +215,9 @@ export var tns = function(options) {
       breakpointZoneAdjust = 0;
 
   if (responsive) {
-    breakpoints = Object.keys(responsive).sort(function (a, b) { return a - b; });
+    breakpoints = Object.keys(responsive)
+      .map(function (x) { return Number(x); })
+      .sort(function (a, b) { return a - b; });
     if (breakpoints.indexOf(0) < 0) { breakpointZoneAdjust = 1; }
 
     breakpoints.forEach(function(bp) {
@@ -432,45 +434,51 @@ export var tns = function(options) {
 
   function getContainerWidth(fixedWidthTem, gutterTem, itemsTem) {
     itemsTem = Math.min(slideCount, itemsTem);
-    var widthStr;
+    var str;
 
     if (fixedWidthTem) {
-      widthStr = (fixedWidthTem + Number(gutterTem)) * slideCountNew + 'px';
+      str = (fixedWidthTem + Number(gutterTem)) * slideCountNew + 'px';
     } else {
-      widthStr = CALC ? 
+      str = CALC ? 
         CALC + '(' + slideCountNew * 100 + '% / ' + itemsTem + ')' : 
         slideCountNew * 100 / itemsTem + '%';
     }
 
-    return widthStr;
+    return str;
   }
 
-  function getSlideStyles(fixedWidthTem, gutterTem, itemsTem) {
+  function getSlideWidthStyle(fixedWidthTem, gutterTem, itemsTem) {
     itemsTem = Math.min(slideCount, itemsTem);
-    var widthStr = gutterStr = '';
+    var str = '';
 
     if (horizontal) {
-      widthStr = 'width:';
+      str = 'width:';
       if (fixedWidthTem) {
-        widthStr += (fixedWidthTem + Number(gutterTem)) + 'px';
+        str += (fixedWidthTem + Number(gutterTem)) + 'px';
       } else {
         var dividend = carousel ? slideCountNew : Math.min(slideCount, itemsTem);
-        widthStr += CALC ? 
+        str += CALC ? 
           CALC + '(100% / ' + dividend + ')' : 
           100 / dividend + '%';
       }
-      widthStr += importantStr + ';';
+      str += importantStr + ';';
     }
 
+    return str;
+  }
+
+  function getSlideGutterStyle(gutterTem) {
+    var str = '';
+
     // gutter maybe interger || 0
     // so can't use 'if (gutter)'
     if (gutterTem !== false) {
       var prop = horizontal ? 'padding-' : 'margin-',
           dir = horizontal ? 'right' : 'bottom';
-      gutterStr = prop +  dir + ': ' + gutterTem + 'px;';
+      str = prop +  dir + ': ' + gutterTem + 'px;';
     }
 
-    return widthStr + gutterStr;
+    return str;
   }
 
   (function sliderInit() {
@@ -590,7 +598,6 @@ export var tns = function(options) {
 
       // slide left margin
       // for IE8 & webkit browsers (no subpixel)
-      // run once
       } else {
         [].forEach.call(slideItems, function (slide, i) {
           slide.style.marginLeft = getSlideMarginLeft(i);
@@ -611,7 +618,8 @@ export var tns = function(options) {
 
       // slide styles
       if (horizontal || options.gutter) {
-        str = getSlideStyles(options.fixedWidth, options.gutter, options.items);
+        str = getSlideWidthStyle(options.fixedWidth, options.gutter, options.items) + 
+              getSlideGutterStyle(options.gutter);
         addCSSRule(sheet, '#' + slideId + ' .tns-item', str, getCssRulesLength(sheet));
       }
 
@@ -630,7 +638,8 @@ export var tns = function(options) {
 
       // slide styles
       if (horizontal || gutter) {
-        var str = getSlideStyles(fixedWidth, gutter, items);
+        var str = getSlideWidthStyle(fixedWidth, gutter, items) +
+                  getSlideGutterStyle(gutter);
         // append to the last line
         addCSSRule(sheet, '#' + slideId + ' .tns-item', str, getCssRulesLength(sheet));
       }
@@ -651,21 +660,27 @@ export var tns = function(options) {
             edgePaddingBP = getOption('edgePadding', bp),
             gutterBP = getOption('gutter', bp);
 
+        // inner wrapper string
         if ('edgePadding' in opts || 'gutter' in opts) {
           innerWrapperStr = '#' + slideId + '-iw{' + getInnerWrapperStyles(edgePaddingBP, gutterBP, fixedWidthBP) + '}';
         }
 
-        if ('fixedWidth' in opts || 'gutter' in opts || 'items' in opts) {
-          if (carousel && horizontal) {
-            containerStr = '#' + slideId + '{' + 'width:' + getContainerWidth(fixedWidthBP, gutterBP, itemsBP) + '}';
-          }
+        // container string
+        if (carousel && horizontal && ('fixedWidth' in opts || 'gutter' in opts || 'items' in opts)) {
+          containerStr = '#' + slideId + '{' + 'width:' + getContainerWidth(fixedWidthBP, gutterBP, itemsBP) + '}';
+        }
 
-          if (horizontal || 'gutter' in opts) {
-            slideStr = '#' + slideId + ' .tns-item{' + getSlideStyles(fixedWidthBP, gutterBP, itemsBP) + '}';
-          }
+        // slide string
+        if ('fixedWidth' in opts || checkOption('fixedWidth') && 'gutter' in opts) {
+          slideStr += getSlideWidthStyle(fixedWidthBP, gutterBP, itemsBP);
+        }
+        if ('gutter' in opts) {
+          slideStr += getSlideGutterStyle(gutterBP);
         }
+        if (slideStr.length > 0) { slideStr = '#' + slideId + ' .tns-item{' + slideStr + '}'; }
 
         str = innerWrapperStr + containerStr + slideStr;
+
         if (str.length > 0) {
           sheet.insertRule('@media (min-width: ' + bp / 16 + 'em) {' + str + '}', sheet.cssRules.length);
         }
@@ -1027,25 +1042,28 @@ export var tns = function(options) {
       // set inline styles for inner wrapper & container
       // insert stylesheet (one line) for slides only (since slides are many)
       if (!CSSMQ) {
+        // inner wrapper styles
         if (edgePadding !== edgePaddingTem || gutter !== gutterTem) {
-          // inner wrapper styles
           innerWrapper.style.cssText = getInnerWrapperStyles(edgePadding, gutter, fixedWidth);
         }
 
-        if (fixedWidth !== fixedWidthTem || gutter !== gutterTem || items !== itemsTem) {
-          if (carousel && horizontal) {
-            // container styles
-            container.style.width = getContainerWidth(fixedWidth, gutter, items);
-          }
+        // container styles
+        if (carousel && horizontal && (fixedWidth !== fixedWidthTem || gutter !== gutterTem || items !== itemsTem)) {
+          container.style.width = getContainerWidth(fixedWidth, gutter, items);
+        }
 
-          // slide styles
-          if (horizontal || gutter !== gutterTem) {
-            str = getSlideStyles(fixedWidth, gutter, items);
-            // remove the last line and
-            // add it again
-            sheet.removeRule(getCssRulesLength(sheet) - 1);
-            addCSSRule(sheet, '#' + slideId + ' .tns-item', str, getCssRulesLength(sheet));
-          }
+        // slide styles
+        // always need to get width property
+        var str = getSlideWidthStyle(fixedWidth, gutter, items);
+        if (gutter !== gutterTem) {
+          str += getSlideGutterStyle(gutter);
+        }
+
+        // remove the last line and
+        // add it again
+        if (str.length > 0) {
+          sheet.removeRule(getCssRulesLength(sheet) - 1);
+          addCSSRule(sheet, '#' + slideId + ' .tns-item', str, getCssRulesLength(sheet));
         }
 
         if (!fixedWidth) { doTransform(0); }
@@ -1088,7 +1106,6 @@ export var tns = function(options) {
     }
     // auto height
     runAutoHeight();
-    
   }
 
 
diff --git a/tests/js/script.js b/tests/js/script.js
index 1c266705..a71899f8 100755
--- a/tests/js/script.js
+++ b/tests/js/script.js
@@ -9,6 +9,29 @@ var doc = document,
     edgepadding = 50,
     gutter = 10,
     options= {
+      'test': {
+        container: '',
+        arrowKeys: true,
+        loop: true,
+        items: 1,
+        lazyload: true,
+        gutter: 0,
+        // controlsText: [' ', ' '],
+        responsive: {
+          700: {
+            items: 2,
+            gutter: 27
+          },
+          768: {
+            items: 3,
+            gutter: 30
+          },
+          1024: {
+            items: 4,
+            gutter: 50
+          }
+        }
+      },
       'base': {
         container: '',
         items: 3,
diff --git a/tests/js/script.min.js b/tests/js/script.min.js
index 55292ce0..aef9de61 100644
--- a/tests/js/script.min.js
+++ b/tests/js/script.min.js
@@ -12,6 +12,29 @@ var speed = Number(document.body.getAttribute('data-speed'));
 var edgepadding = 50;
 var gutter = 10;
 var options= {
+      'test': {
+        container: '',
+        arrowKeys: true,
+        loop: true,
+        items: 1,
+        lazyload: true,
+        gutter: 0,
+        // controlsText: [' ', ' '],
+        responsive: {
+          700: {
+            items: 2,
+            gutter: 27
+          },
+          768: {
+            items: 3,
+            gutter: 30
+          },
+          1024: {
+            items: 4,
+            gutter: 50
+          }
+        }
+      },
       'base': {
         container: '',
         items: 3,