I have just purchased a new Sunbeam Bread machine model 5891-33. There is a very large gap (1/4 - 1/2 inch) between the back of the lid and the machine body. This gap extends from the back of the lid on both sides of the hinge and gradually lessens to a snug fit at the front of the lid. Is this normal, or should I ask for a replacement? Thanks for your help.