need a ruling

[dopp16]

ok,loose 1-2 no limit at harrahs. The 7-seat is loose aggressive and the 3-seat is tight as a tick. flop hits

A K 8. 25 dollar bet by the 7 heads up with the 3. Quick call. Blank, Blank

River,7 tosses a 40 dollar bet in and the 3 the says I think you have me beat but I call. 7 flips over a bad king and the 3 says Aces but when he throws his cards up, the ace hits a corner and flips down. Dealer wasnt paying attention and thought it was mucked, starts to pull the cards in when the 3 says stop and calls the floor over. Here is the funny part....Floor says what were your cards to the 3-seat and he says a/5, the floor then asks the dealer to flip his cards over and there was the a/5. Then the floor awards the pot to the 7-seat even after seeing the a/5. what do you think