I had this soon after I had my highline dash fitted with my MFD2. If I went into the audio menu I couldn't get out of it. All the other menus worked just fine. I found a quick and dead easy temporary solution. Just switch off the radio momentarily, this then takes you back to the main menu.
Turns out on mine that the high line dash i had fitted, wasn't compatible with the later style switches on my mfsw. Had them changed for the earlier versions and the problem was sorted.
Sounds like it's the switches on your steering wheel causing the confusion, or incorrect coding ?