You may have several different records on your ancestor, various census enumerations, city directory references, an obituary, a mention in a county history, a marriage register entry, a death certificate, a mention as a witness on a document, etc.?
How certain are you that each of these references are to the same person? Could there have been two people with the same or similar names? Have you possibly confused two first cousins, a father and a son, or two unrelated people.
It is always possible and something to keep in mind.