However, balance ctrl in center, I have left channel output in both speakers.
Are you sure about this? Doesn’t make much sense to me. I’d check that you didn’t just hook something up wrong when you moved your system. Or, turn everything off and unplug, disconnect everything and reconnect, turn back on (preamp first as ALWAYS), and see if that fixes it. Bryston stuff doesn’t break easy so I’m leaning toward user error here. Anyway, I feel your pain and best of luck in sorting it out.