FB works fine. If you create a FB theme you only see the edit able regions no design, thats how it looks in my DW design view, too.
You need to do:
Webassist> Framework> Themes > Create Page From Theme
You need to change the links that the extension creates in the code view. if you change the link, you can see what FB does.
change your design of DW template. then just upload the changed DW template and all pages got the new design.
so you save a lot of time.