Lineups somehow change at start of game
 

I was playing a fictional league and everything was fine...
then I created a new fictional league, and at the first preseason game I noticed that the pregame comparison showed my lineup to be different from the lineup I had assembled prior to playing a game.
This wasn't happening in the previous league I'd created -- I set the lineups -- and they appeared in the games just as I had set them.
Anyone out there can set a newcomer straight on why this is happening?

OK, so it was a dumb question. Yes, I just didn't realize that the pregame listing of players is not the lineup, but rather a list by player position for comparison purposes. I just never noticed that before. So the lineups I set are indeed being used in the games. You just don't see them till you jump to the actual 3D Game screen.