Bank didnt except offer OVRT asking price.

This home that I am trying to buy is a repo. I dont know if it is owned by a bank or other entity. I made an offer that was above the asking price. I thought that this would guarantee me or another buyer the deal.

Well it didnt. They came back saying that multiple offers had come in and they want everyone to reconsider their offer.

Is this normal? I would think that if I bid over the price that it would be a done deal.