I recently purchased my first Fatboy razor from ebay. When I loaded a new blade I noticed that one corner the blade will take a dip down and touch the guide giving the entire blade a slanted effect. When I removed the blade I noticed the head of the razor on one side is not true to the guide. Is this common with a DE razor? Should I contact the seller for an exchange? Am I just better off buying a new Merkur Futura?