You need to call Air. This has perplexed me, since your earlier statement. Since the three bladders are individual, stand alone air chambers it would seem theoretically impossible to do what you describe. However, I just got off the phone with Aire and they said there is a rare occurance where over repeated overinflation two bladders can fuse and pass air between the two. Sounds extremely unlikely to me but what you describe fits to a T what would happen. It appears that you have been blessed with an extremely unusual issue!
I talked with them a few minutes ago and used the "a friend has this problem" discussion and he described what you've run into. I'm utterly surprised as I would have bet you a new boat that it wouldn't be possible to share air between bladders in an Aire.