It sounds like you guys have had some bad flashes or something. But, that's just my opinion.
Try reflashing, and I suggest doing it in the recovery mode (in case a flash goes wrong, or it's corrupted somehow). Once it's done that, shut it off, and let it sit, and then plug it in, and go about setting it up. It SHOULD clear all your settings. At this time, do NOT back it up with old gateway settings, just redo it all. Yes, I know it's a pain, but it can eliminate any possibility of any corrupted settings, etc that don't quite match up between versions.