I booked a ticket last week with AA, directly on their website, routing DUB-TPA///PHX-DUB on my UK card and I got the holding email saying my tickets were pending.
My flights are all AA operated on AA flight numbers and it still took about 2 hours for the confirmation email to come through with my actual ticket numbers and seat reservations.
It seems odd you'd wait that long, but perhaps give them a call.