The way I think it works is this.
Each day you can re-set your lineup.
It would be better to make sure as many of your 8 "starting" players actually play that night. The system will lock in your lineup 5 minutes before the tip off of the first game, then total the points for your starters & your bench for that days games.
The following day you can change your lineup again, so as many of your players that play that night can be in your starting linup. The system will once again lock your new lineup 5 minutes before the tip off of that nights games, then once again total the scores for your starters & bench players for that days games.
Same for each day of the week.
Our games start on a Monday & end on a Sunday.
And if I'm reading this right, a player can only play a maximum of 3 games per week. They might not count a 4th game so if you have a guy playing a 4th game that week you might want to move him to the bench.
Since this is the first year here for all of us we're kindda learning as we go.
I hope this is correct, its how I understood the rules anyway.