DateTimePicker里面的自定义CalendarX样式时<Setter Property="IsTodayHighlighted" Value="True" />显示有问题

[Sandf123hehe]

 <pu:DateTimePicker
     Width="250"
     Height="40"
     pu:DropDownHelper.MinWidth="NaN"
     pu:DropDownHelper.Width="NaN"
     ClearButtonVisibility="VisibleOnHoverAndNonnull"
     CornerRadius="10,10,10,10"
     ItemsCheckedBackground="#36AAF7"
     ItemsCheckedBorderBrush="#36AAF7"
     ItemsCheckedBorderThickness="2"
     ItemsCheckedCornerRadius="5,5,5,5"
     ItemsCornerRadius="5,5,5,5"
     ItemsHoverBackground="#36AAF7"
     ItemsHoverCornerRadius="5,5,5,5"
     Mode="DateTime"
     >
     <pu:DateTimePicker.CalendarXStyle>
         <Style BasedOn="{StaticResource {x:Static pu:DateTimePicker.CalendarXStyleKey}}" TargetType="pu:CalendarX">
             <Setter Property="ItemsCornerRadius" Value="5" />
             <Setter Property="ItemsCheckedBackground" Value="#36AAF7" />
             <Setter Property="ItemsCheckedForeground" Value="#FFFFFF" />
             <Setter Property="IsTodayHighlighted" Value="True" />
             <Setter Property="ItemsHoverBackground" Value="#36AAF7" />
             <Setter Property="ItemsCheckedCornerRadius" Value="10,10,10,10" />
             <Setter Property="ItemsCheckedBackground" Value="#36AAF7" />
             <Setter Property="ItemsHoverCornerRadius" Value="10,10,10,10" />
             <Setter Property="Background" Value="#FFFFFF" />
             <Setter Property="HeaderSeparatorVisibility" Value="Visible" />
             <Setter Property="HeaderSeparatorThickness" Value="1" />
             <Setter Property="Width" Value="{Binding ActualWidth, RelativeSource={RelativeSource AncestorType=pu:DateTimePicker}}" />
         </Style>
     </pu:DateTimePicker.CalendarXStyle>
     <pu:DateTimePicker.TimeSelectorStyle>
         <Style BasedOn="{StaticResource {x:Static pu:DateTimePicker.TimeSelectorStyleKey}}" TargetType="pu:TimeSelector">
             <Setter Property="ItemsCornerRadius" Value="5" />
             <Setter Property="ItemsCheckedBackground" Value="#36AAF7" />
             <Setter Property="ItemsCheckedForeground" Value="#FFFFFF" />
             <Setter Property="Width" Value="{Binding ActualWidth, RelativeSource={RelativeSource AncestorType=pu:DateTimePicker}}" />
         </Style>
     </pu:DateTimePicker.TimeSelectorStyle>
 </pu:DateTimePicker>