So, just an update. Its been a few days and the credit is still on my account. It shows credit for UA 7 on 8/16 (which I did fly) and 8/17 (which I did not, I don't think it is even physically possible to be on UA 7 on consecutive days). Earnings for each one are identical.
To clarify, there were no schedule changes, IRROPS or anything else.
I have to assume they'll catch their error eventually and take the erroneous credit away.