Once the time is set, 1min after. Meaning, if a game starts at. 3:15pm, I set the deadline to 20min prior to start of the game. Picks are locked in at 2:56pm.

Yes up until, again if I set the 20min before a game starts. Picks are locked at 19minz before the game starts.

Yes, a player should have the option to allow another player to enter their picks.

The last week before the SuperBowl.

The player that is closest to both teams scores combined.