what happens alot is a girl / family really wants to land a spot on a particualar team, so they go back twice and then a third time - over 3 weeks.. The team is holding off pending a better player come their way, as others have said go to other tryouts, take the spot on one of those teams if that is a good fit... we had a girl two years ago not commit to one of our teams because they went thru the 3 come back game, when they eventually did not make that team, they came back to our coach and they no longer had a spot for her... eventually she landed on a team that she really did not want to play with but needed a team...
You have to ask yourself - how much playing time is my DD really going to get even if they offer on the third tryout... answer, not much.