Loss prevented... in a Normal game... that played all the way through?

For one, it seems rather silly to loss prevent a normal game wherein you don't really lose anything for... you know, losing. Secondly, the game played all the way through. We got our asses kicked and that's all there is to it--WE DESERVED THE LOSS. It said loss yesterday, but today it now says the loss has prevented. I suppose it's not much of a big a deal, but what would cause this to happen to a "normal" non-ranked game? Especially when we played all the way through and just got beat by better players.