Hi Kerry,
Thanks for looking up those records, very kind of you

I think we may have been looking in the same place

SFHS?
My confusion started because I originally had the birth record for John from familysearch, which says he is the son of John Mepham and Mary Carpenter. Then, a few days ago I looked on SFHS for any more children and they have John as a child of John and Elizabeth.
I have the marriage of John and Mary, but just didn't think to look for a marriage between John and Elizabeth. By not finding one that does seem to indicate the birth has been incorrectly transcribed on SFHS records. Thanks for thinking to do that.
I can probably rely on the familysearch record now
