According to AA when I had a similar (but different) question, it has to do when the flights are taken, not when they post. In my case, I asked them to switch over from the gold to plt challenge about 1/2 hour after taking a flight. They said they would "backdate" it for the morning, but nothing else flown before that day would count. If you can take AAdvantage of a glitch, though, more power to you.