Travel or BC and whose call?

[bard]

Freshman girls last night. Visitors (B) trying to bring ball from backcourt to frontcourt against A's press. Pass from B1 to B2 gets loose. A1 dives for the loose ball near the center line, but before it has crossed the line.

A1 is on her back, has the ball firmly in her hands, and slides across the center line.

I am trail. My P, helping out during the press just as he should, whistles a travel. I whistle at the same time, signalling a BC violation. My P said the girl was trying to get up, and that's why he called the travel.

I have no problem with my P's call. He was exactly where he was supposed to be, and he had a better view of a potential travel. My question is, was I correct with the BC call? I also don't think there was a problem with the double-whistle given all of the crowding with the fullcourt press.