[WillyT]

I was a bit confused. I would have thought what Mrfizzbin suggested to be correct, and still do.

What happened was that the floor initially suggested MP and BTN each owe another small bet from what they missed preflop. BTN was a bit angry about this insisting that it can't be right because he had no opportunity to 5 bet preflop if he wanted and that it couldn't be replayed now since there had been action on the flop.
After the very small outcry the floor conceded to having BB take back 1 small bet which he agreed to, probably being happy about it as he folded the turn.

Learn something new every day.

Thanks all,
Bill