You have the same problem I had when my menus were corrupted. How it happened it I don't know. I don't think I was ever hacked though. I had to go into the database and re-add the menu blocks and delete the copies the builders made. It's pretty strange if you ask me but I suspect it's a bug. Interesting that MichelSwiss said about the Game Mod, Wolve installed his game mod in my site and afterwards things did go whack. Still waiting for him to fix errors in his mod (3 weeks and counting) see more - Everynow and then things disspear in my Menu builders and I have no idea how to fix it.