First and last names of your ancestor will be spelled differently,
sometimes different ways in the same document. There is more to
"matching" people that the spelling of their first and last name. Make
certain you have valid reason to believe people appearing in different
records are the same person.
And remember--the name is usually considered the "same" if the
pronunciations are the same. That missing "e" may irritate you, but it
doesn't mean it's an entirely different person.