re: UNC wasn't awarded an extra play because of the penalty...

It might have technically been the correct ruling, but IMO it certainly doesn't seem right that UNC can run an illegal play - with the clock running - and that illegal play in itself ends up stopping the clock and giving them another play.

I trust that the refs got it right, but it certainly doesn't seem right to me.

But Tenn has no one to blame but themselves. They should have never been in that position to begin with (XP, Jackson penalty, etc)