If the Captain said, at 9:05 AM, that OP's was the first flight out of the day, that would mean a scheduled departure time of 8:20 AM. Even presuming that OP is sending this 20 minutes after the announcement, that means 8:00 AM.

That is simply untrue. Not defending TSA here, but when the Captain says that an 8:00 AM is the first flight of the day and that is untrue, what does that say about the rest of what he says?