I checked my account today and was just matched from AA Platinum to Delta Gold! ^ It took about a week and not a moment too soon as I have a flight to Asia in 2 days! As I am new to complimentary upgrades, if available, it would be just for my AUS-ATL flight, not the ATL-SIN right? If so, I'm within the 3 day window but no upgrade, and I checked and there are still seats in 1st available...is this common?