6 Players on court:Late Call

[dbmcubs21]

Another intramural situation (questionable officiating, I know). Timeout is called, after timeout both teams come back onto court with Team A-5 players, Team B- 6 players. Team A takes the ball out and scores a 3 point field goal, while coming back on defense Team A can't seem to match up and Team B scores a 2point field goal. It is then realized that Team B has 6 players on the court (no wonder someone was open).

Officials come to this conclusion- Technical on Team B for too many players on court. Take Team B's 2 points away, but leave Team A's 3 points. Turns into a 7 point swing after Team A makes both free throws.

What is the correct way to handle a later realized 6 player call? Can you take away points?