It seems like this SPAM filter is out of control. I did some research and was able to tweak it some:

1) I switched to a new SPAM service. This one seems to get way too many false positives. We're now checking against https://akismet.com/ instead of the http://antispam.typepad.com/ service we were using.

2) I found a way to set a limit on it so that it can skip scanning posts from users with a post count over the threshold. Before this was not being factored in.

Let me know if this helps.