funny story regarding a similar scenario....
buddy of mine is playing 20/40 at winstar in oklahoma. he has JJ up against QQ and AA, cap before the flop.
flop comes JQrag, cap again after the flop
turn is a blank...cap again
river is the 4th J, but now the dealer notices that one of the people in the hand failed to complete one of the last bets by something like $10. they call the floor and decide the J is to be placed back into the deck, and the cards are reshuffled before dealing the river. of course the guy is furious at this, but what they say goes. anyway, they redeal the river, and it is the J again.
i never understood exactly why they do it that way, but i support following the rules strictly. it would be way too risky to allow a floorperson to pick and choose when to let it go.

mflo