The same thing happened to me. Cleared TATL 2/12, reissued the same day. I cleared the connecting segments two days later, reissued again. (Clearing the connecting BA segment also involved AA accidentally duplicating the SWU deduction, a small add collect, and another hour on the phone to get the duplicate SWU reinstated and the ticket reissued a third time. This is a tangent, but (a) dealing with this upgrade has already taken a significant amount of my time and (b) I spoke with several representatives, none of whom ever indicated that something was amiss with the original SWU clearing).

Today, I saw I was back in the original cabin, with zero communication from AA. I called in and the representative could see I was both waitlisted and confirmed for the same upgrade, ticketed in C but seated in PE -- they said they'd never seen that. They went to their help desk, who said it was a known issue affecting many people and they will see what they can do after the weekend.

Like others, my original seats are no longer available. C also opened on alternate flights with comparable fares during the week (EF alerts I never deleted), so, I could have moved to them if I had thought my upgrade had not cleared. I don't see how AA makes this right for me at this point other than to put me back in the upgraded cabin.

And even if they do that -- to downgrade passengers on issued tickets without a word? Not a good customer service experience.