Awww what a night
 

GV and this is a 3 man. We have a foul on A2. I report the foul on A2 and go back to center. Fans for team b were yelling saying, "That was 20's 5th foul." We didn't pay it any mind. Middle of the 4th quarter, A2 fouls again. We shoot one of the two shots and finally the score table buzz us over and said that was actually A2's 6th foul. I go and and tell team a hc that a2 is dq. He had no problem over that. Team B wanted a T because team a was playing a dq player. I told her that a2 wasn't dq until the head coach has been notify. Question: Was I right for not giving Team A a T?
Question: Next time, should I give the table a meeting at well?

First of all, yes, always do a pregame with the scorer's table.
Secondly, you were correct. The player is not DQd until his coach has been notified. There is never a T for this particular situation.

It may be worth your time to just double-check with the book how many fouls the player has. Sometimes the crowd is right.