I am totally confused in need of a fresh pair of eyes

Have I gone down a wrong road?
John and William are brothers born in Billingshurst, sons of my Gt x 3 Grandfather Edward and Hannah Redman. Both baptised in adulthood in 1827 General Baptists Billingshurst.
A John married Elizabeth Burchall 9 May 1831 Billingshurst, which I always though correct
.
Then I found a William married Elizabeth Burchell 6 Apr 1822 West Chiltington.
Note the subtle difference in Elizabeth's surname one has e and other a probably just mis-transcription.
Found 2 poss births for Elizabeth . 1806 Billingshurst - parents Hannah and John . 1804 Billingshurst - parents Henry & Elizabeth.
Have birth details for children of John and William, and census which do show both brothers wives are Elizabeth. But maybe they are not brothers?