Commentators don't always know what's going on. This is one of those cases.
If you'll notice, after the first technical FTs and Charlotte inbounds the ball, the player heaves up a shot from mid-court as he's being fouled. Therefore, it's a 3-shot foul. If you count the FTs at the very end, this is obvious. He shot 3 for the foul, then two sets of technical FTs (you can hear the arena PA guy announce these), for a total of 7. The Richmond coach was not happy that they called it a foul in the act of shooting. He thought it should have only been 2 FTs, so he freaked out. And after obviously being told to settle down, this was the last straw.
The commentators never knew what was happening. One of them even said he was losing count of FTs.