Bummer about the voltage offset hassle with your AD2, mate. Kudos for trying the calibration fix, but it sounds like it's still giving you grief.
If it's still acting up, it might be worth shooting a message over to Digilent for some tech support. They're usually pretty helpful with this kind of stuff. But before you do that, maybe try a hard reset if you haven't already – sometimes that can work wonders.
Oh, and speaking of electrical stuff, when we had issues at our place, we hit up an Ottawa electrician who sorted us out properly. It might be worth getting their take on it, too.
