They're not up to snuff and could go bad quicker than they normally would. If you have them return them to the store for a refund or exchange. Needless to say, you shouldn't eat them.
Not The Cheese!! Kraft Recalls American Singles For Possible Premature Spoilage - Consumerist
Not The Cheese!! Kraft Recalls American Singles For Possible Premature Spoilage - Consumerist