There is a bug in CB plugin framework which prevents of insertion of content after the tabs have been loaded.
If you want to fix the bug, read this:
www.joomlapolis.com/component/option,com_joomlaboard/Itemid,38/func,view/id,1811/catid,10/
And then modify the plugins to do their javacript stuff in function onAfterUserProfileDisplay. Then delete the unnescessary tabs (at the database level)
As soon as CB releases a the fix for this bug, I will modify the plugins to not inlude the extra tab.
-Mikko