Assistance appreciated!

[SWMOzebra]

I was keeping score last night for the local men's wreck league, when this play happened:

A1 drives the lane to shoot, crashing into B1 (couldn't tell from my spot if B1 had LGP or not). Of course, you know what goes down next: lead whistles and signals block, while the trail whistles and signals charge, both teams in the bonus. The shot does not go in. Refs charge 1 foul each to A1 and B1, then say they're giving the ball to A for a throw-in on the baseline. Naturally, an argument erupts from team B....but play proceeds.

At halftime, I grab my case book (left the darn rules book in the car) and flip to 4.19.8 (c). I understand that on all double fouls, play proceeds from the POI with no free throws and the ball does not become dead on the whistles until the try ends. Since team control ends with the try, shouldn't the POI have been the possession arrow? I'm thinking the arrow should have determined who got the ball and then it should have been reversed on the throw-in. If not, how do you proceed from here?

Thanks in advance for the help!