If you are talking about the airport upgrade list, you will not be moved over until you check in. Sometimes that carry over to the airport upgrade list gets lost if you check in too quickly after making a change (common with Same Day Flight Changes), in which case you want to wait 10 minutes or so after the change to check in again. The upgrade request also sometimes doesn't carry over if your first leg is on another carrier - like Alaska, in which case you will need to see an AA agent to add you to the airport upgrade list before your AA leg.