This appears to be a bug in AME.
Originally Posted by Aquarezz
AME has special rules for handling vBulletin -- and they don't seem to work with DP.
I disabled these four AME definitions and that seems to make the problem not appear:
**Internal Linking (Forums/Categories) internal_linking_forumscategories
**Internal Linking (Member Profiles) internal_linking_member_profiles
**Internal Linking (Single Posts) internal_linking_single_posts
**Internal Linking (Threads) internal_linking_threads
This bug only shows up for external vBulletin forums that don't run vBSEO -- which in the webmaster niche is pretty much only DP.