EF showed 7 seats available on 2 connecting flights for upgrades. Bought tickets and when I went to do the upgrades only one flight had available sets now. However, back to EF it still shows 7 seats available for those connecting flights. When I separated the flights out and did a search on EF the first flight I booked shows 0 seats available for upgrades. So why is there that discrepancy? The flights are bookable as connecting flights on AA. Thanks for the help.