I can only make Two Subforums

I have a max of two subforums.
If I make another the top one disappears.

Also I can't delete my Test-What is? group. lol

Yes, this has been mentioned before, and Keleth is working on a fix. Your forums aren't gone, but the top page will only display the two most-recent ones. The older ones are still there; you just need to note the URL.

A current workaround is to create or sticky a thread with all the URLs of your subforums.