Hello! I recently brought my business from a competitor to AA, and completed a challenge into PLT status. All of my flying on AA has heretofore been domestic, but now I have some international flying coming up and have a question that I'm sure has been answered but which I'm unable to find. I'll be flying SEA-JFK-LHR next month on a discounted coach fare, and according to AA's website, "Upgrades are valid to the next class of service and limited to a single one-way trip with a maximum of three segments." This leads me to believe that, for 25,000 miles and a copay, I get upgraded to the next class of service on up to 3 segments--in my case, that would be into F for SEA-JFK and into J on JFK-LHR. The JFK-LHR segment has no availability right now in C (naturally), and on the SEA-JFK segment I've already submitted a request to use stickers to upgrade. I intend to call AA and request to be wait-listed for a mileage upgrade on the international segment, which leads me to the heart of my question:

If I wait-list for a mileage upgrade for the entire SEA-LHR trip, what happens to my stickers if I get an upgrade to F on the domestic portion, and then later clear into J on the international portion? Based on the language, it seems that the 25,000 miles plus copay would cover my upgrade on both the domestic and international segments, so would I get the stickers credited back? Or if the domestic portion clears before the international leg, am I just out those 5 stickers? Thanks in advance for your help!