Thanks for your research, good of you. I'll have to order a marriage cert although observed no father on 1841 census, so I think it will have to be a birth cert.
You should always go from the known and the known is the marriage. If Albert gives Samuel shoemaker as his father on his marriage then the interconnectiveness via the children, the baptisms and Chew Stoke and the Allen family (the 1851 census has William in the margin in front of the name Samuel) prove the family is connected and it would also prove the name Alfred on the 1851 census was a mistake for Albert - see table