I'm not one to post about this subject very often, but I can't help but think this reminds me of hockey.
It's old 1st line , second line etc. and who is starting the game. Just because the players a coach considers his best don't start the game doesnt mean they aren't his best players.
It may not be a perfect analogy. But, someone stated earlier, Rex is doing this to stick to his word about it being a competition. It is in everyones best interest who is invested in the Bills to answer all the questions as throughly as possible. Don't get to hung up on the order of appearance, or worrying about how it makes the media look. The media doesn't care! This will all play out and the best QB will win. I am confident in saying this.