Wynn Floor Decision: Weird Spot

[WillyT]

So the action at the Wynn is crazy this week and limit hold'em is dying. There were just two tables of 15/30 and one of 30/60 while there were several tables of omaha variations and every table in the room was going.

I was sitting in the 30 and an interesting floor decision came up.
The action goes as follows:

MP raises preflop, BTN 3 bets, SB folds, BB 4 bets and before anyone one notices/says something the flop is dealt without MP and and BTN calling the BB's 3 bet.

Flop comes out and BB bets, MP calls, BTN raises and BB calls.....and here is when someone finally points out that the pot isn't right and that MP and BTN hadn't called the preflop 4 bet.

Floor is called over...what should they do?

Thanks,
Bill