NJ High School Ref please give me ther rule

[redoubtable1]

Real game this past season. It took me four games to get over this loss. We're on the road, TV cameras everywhere. Fourth quarter, 12 seconds left, down 3. After a timeout, we inbound the ball, get the ball to our player at the top of the 3-point circle, clearly behind the line. Player all over him. Releases the ball, shot good, 3-pointer signalled. Tie ball game. Home team calls time, no protest by their head coach and their fans go completely silent. If it wasn't a 3-pointer, somebody would have said something, right?

During the timeout, however, the officials suddenly get together and after a brief discussion and with no explanation whatsoever, they changed the call to a two, leaving us down 1. We lost by 3. If it wasn't a 3-pointer then why did the referees count the goal then wait halfway through a timeout before inexplicably changing it to a 2?