It's not that hard. A double foul goes to POI. POI gives it back to the team in possession. So, was there possession? If A1 had the ball when the blarge occured, POI would give it back to A. If the shot was in the air when the blarge occured, and it went in the basket, you would also go to POI, which is giving the ball to B for an endline throw-in. If the shot is no good, you would use the AP arrow, because there was no team possession on a shot.
Sounds like whoever told you this might understand it less than you already do.
