So I assume that Edward and Helen got married there I have also seen typos of her name as ellen.
1. Never assume people got married at the same church they had their children baptised.
People got married at the most unlikely places sometimes, for any number of reasons.
Always spread the net wide - even to other counties, and further afield if necessary.
2. 'Ellen' will not be a 'typo'. Ellen is an alternative for Helen. Women with that name could have been called either of them, (or Nell, or Nellie.......).