Don't quite get the Define CSS path

If I try using tokens, my Font Styles don't get populated. But it works if I use a complete path.

Here is my token version:
%b%t/css/editor.css <-- doesn't work :-(

And my complete path:
http://www.website.com/sites/all/themes/mytheme/css/editor.css <-- works!

What am I doing wrong here? Is there a way I can see the expanded tokens? Thanks!