If you use the sidebar-1 position when you are in mobile view it puts the box shadow and border behind the main content not just the modules in the sidebar-1 position. This does not happen when you are using the sidebar-2 position. Also, if you are using both the sidebar-1 and sidebar-2 positions at the same time it doesn’t happen either. It only happens if you just have modules in the sidebar-1 position.
This is what seems to be messing it up
.ja-sidebar .ja-module {
background: #f7f7f7
margin-bottom: 20px;
padding: 5px;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
border-radius: 3px;
}
It seems to be fixed if you add a clear:both; to the css for this div layer.
thanks,
Josh