Can't get this to work

[impy101]

I'm fairly new to HA and I've got the latest of everything.

I followed the guide to the letter but when I try to add the custom grid type to my config I get the following error:

Unable to parse YAML: YAMLException: duplicated mapping key (7:1) 4 | - theme: Backend-selected 5 | path: default_view 6 | type: 'custom:grid-dnd' 7 | title: Home -----^ 8 | layout: {} 9 | subview: false