Situations from last night.

I had two situations in games last night that I am not sure we handled correctly.

1) Boys Var, 3 minutes left in the fourth quarter of a 30-40 point game. A1(#30) comes out of a time out and I notice he has blood on his jersey, so I tell the coach that they need to take care of it. He tries to clean it off with some saline but it doesn't come off. He ask if he could switch the kids jersey to which I say that he can but if they don't have an extra and he has to switch with a player that has already been in the game it will be a T. Just looking for clarification on this I think I know but not sure.

2) Boys Var 2nd game, last seconds of first quarter. A1 gets ball in middle of lane and goes up to attempt a shot, before he releases the ball the horn goes off. As the trail I am waiving off the shot immediately after the horn sounds. Underneath the basket my partner is calling a foul on B1 and counting the basket for A1(he wasn't paying attention to the clock because it was my call on the last shot). I go over to him and tell him that the shot wasn't released before the horn so the basket doesn't count. Now I am expecting to be shooting two free throws with the lane cleared but my partner says that the period has ended so there was no foul. My question is if the shot had counted we would have counted the basket and shot one, so why didn't my partner waive off the foul and which one of us is correct?

I have my own opinions on these but want to see what everyon else thinks, Thanks.