Subdirectory mirrors overdirectory?
 

This is rather confusing...

Basically, I have my forum at http://forums.mtgdarkness.com, and then I have some subdirectories at places like /chat/ (AJAX Chatbox) /wiki/, etc...

Well, check this out: http://forums.mtgdarkness.com/chat/
Or this: http://forums.mtgdarkness.com/s/absolutenonsense
I assure you, there is no directory called "absolute nonsense" on my server... I don't know what's causing it. I disabled all my plugins and products and that didn't change anything...