Mind change on ballhandling call?

[Scrapper1]

Today, I was R2 in a college match. We had a play in which a Team A player took a wild swing with a closed fist to send her 3rd contact over the net. R1 whistled and called a lift on the play. Coach A nearly has an aneurysm.

I got to him pretty quickly, as he was trying to protest across the court. I told him that he could send the captain, but we're not going to yell across the court. The captain goes to the stand and is told that the player had essentially carried the ball on her forearm while making her swing. (Prolonged contact.) Coach A is not satisfied.

R1 calls me over, asks what I have. As always, I ask: did she catch it? Did she throw it? He says no, but the ball stayed on her arm. Long story short, he decides to replay the point. (I think that was the right decision.)

But now Coach B is mad. He says to me, "He can't change his mind on a judgment call. It's his judgment! He can't change it because of YOUR judgment!".

There's actually a certain logic to that, I suppose. But I didn't have a good reply for him. So. . .

First, is he actually right? Can the R1 not get help on a judgment call and make a correction to his/her initial call?

Second, if the R1 can make that kind of mind change, what could I have said to Coach B to make that clearer for him?