I have been extremely lucky on my research.

Between my ancestors not moving much around North Norfolk and extremely good parish records I have done well. However I have hit a bit of a wall with one individual and I am looking for advice on where to go.
I currently have the following for my Great (x3) Grandfather William DICKERSON;
Buried on 21 Feb 1858 in Wells Next the Sea age 80
Census 1851 Wells Head Age 75, Mariner born Binham (Wife Elizabeth Age 60)
Census 1841 Wells William Age 60 Mariner
Wife Elizabeth age 45
Daughter Mary DICKERSON 20
Thomas DICKERSON 15
William DICKERSON 15 (Shipwright)
Baptism records for Thomas and Mary confirming dates, parents and all in Wells
Baptism for William states his name is William Read Dickerson again in Wells at the correct time
Marriage of William Dickerson and Elizabeth Read – 20 Jun 1817 Wighton.
So now my problem on the Parish records for Wighton they state that Elizabeth was 24, which fits with the details I have for her. However for William they state he is 26. So I have the Census in 1851 (less useful 1841) and the Burial record stating he was born about 1776 but the Marriage stating 1791. I have been through all the Parish records for Binham and can not find a William Dickerson about either of the times.
I would really like to at the very least confirm his place of Birth or Baptism in Binham.
Thanks you for your help and advice.