I've noticed on several occasions of reporting spam that the person shows more than one post in the user info. I click on the name and select views posts. The search results show less than the stated amount of posts.
Like today I was checking out an odd post in the wrong location and after reading it I noticed they had 2 posts. When I did a view posts, it came back with just the one. ( I reported the post BTW )
Seems that may be a bit of a bug worth looking in to. It may be the result of a mod you installed. May want to kill the hooks for a few days and see if it continues to be a problem.