No it wasn't me but this is kinda freeky
What I now did now was to remove a forum that I created as a link to the classified section (You know where you add a URL as a forum) instead of the forum being a forum...
Now "it" is not changing location anymore and I can see for the last 10 minutes it's been at the same URL. The strange thing is that the link that I added for the forum to classifieds was a plain http://www.mysite/forum/classifieds
so it is not if it can go anywhere else..
..and as I type this it doesn't show in online people anymore.. explain the odd directories to classifieds to me