Every piece of evidence brings more questions.
But this is so cool!
First of all, everything fits. The two fathers of bride and groom are right and (1789) John Vaughan's profession is butcher in 1846! This predates (1825) John Vaughan's 1846 marriage to Maranah Watkins by two months so it's OK for Jane Lewis as a witness at her brother's wedding to be using her married name!
