Della, the information from census records can be confusing sometimes. It depends on whom the census taker (back then door to door) interviewed at the residence. I had an ancestor who was suddenly six years younger than the census taken ten years before. Also, if a child gives the information, they're often wrong. Margaret might have been called "Mary" for short. He may have owned two properties, giving family names each census interview. Lots of things could have happened.