[JRutledge]

Let us take this one at a time.

First we have a facemask before B gets the ball. So B did not get the ball with clean hands to start with. That is going to be treated as a live ball foul, the only one we have at this point.

Second, we have dead ball foul with the taunting.

Third, we have a penalty that happen during a loose ball, so the enforcement if accepted will go back to the previous spot.

So if we have an accepted penalty, we go back to the previous spot and access a 15 yard penalty (which it seems from your discription) and we repeat the same down. But because we have a dead ball foul, we must take back 15 yards of that penalty for that foul basically the ball would be in the same place. We do not seem to have "half the distance" issues.

I hope I got that right, but it is hard to read your post with all the caps.

Peace