Originally Posted by
coke cans and winglets
Figured I'd update this, called AA two days after making this thread and even after deleting and adding my BA number again, it wouldn't let me pick a free preferred seat. They told me to give it a few more days. I then completely forgot about it until last night, then went to book a new flight in AA Main Cabin where it was letting me pick a free preferred seat. Looked at my flight on Wednesday afterward and it wouldn't let me get a free preferred seat still, so I called AA and had them delete and add my BA number again, and then it finally worked. So I noticed that it let me select my preferred seat 6 days after I actually got the status. Whether I had it before and didn't know I have no idea, but I noticed it last night. Problem solved though.
Great! Be sure to set an alarm for 24 hours before scheduled departure to try to snag an MCE seat.