Dynasty Starting Lian-up?

can someone tell me why for some regular season games the CPU changes the starting lineup? For example, LBJ is a starter, but for some games i look at the boxscore and he came off the bench? I then go bak to record roster and he's a started? Why does it do that?

Also, for some reason the computer changes the line up of a player even though a better player is avalible. For example Spree was 74 and he was SG/SF, but i had a rookie player 75 SG/SG, and the computer would keep putting Spree at SG! If i change it then CPU would put him back to start when someone gets injured?! How do i stop that?

THnx

Just as in real life, the CPU changes its starting lineup from time to time. It just doesn't always do it intelligently.