It is a little annoying to have the game auto load a CTTH challange when you start a game. You have to start the CTTH and then close it. Really--CTTH tourneys should be a choice.
If this continues to be a problem, even after going thru it once...
Check out my post (at the bottom of page 5) in "Latest Changes".
After I cleared-out some DivX stuff, some of my problems (including the CTTH "redirect") vanished.
GL,
Pugs