Classified Duplication Link Bug

Classified plugin seems to have a bug, but I'm not sure it's really a bug. Anyway, I deactivate classified plugin since I caught the bug. What is the bug?

A user's blog shows multiple classified links to expire classified ads or was duplicated or link to the same page, something like that, and the blog is using default wordpress 3.0.3 template.

Is this plugin compatible with buddypress 1.2.6 and wordpress 3.0.3? thanks...