Hi Lin
just a few thoughts
are you sure that the Joseph Horton that you have found on the 1851/61 census is the right person?
are you sure you have the correct marriage certificate?
does the marriage cert give his actual age or just 'full age' ?as the birth year that you have given would make Joseph about 35 when he married( a little old unless it was a 2nd marriage)
Even if you are certain that you have the right Joseph, the father's name on the marriage cert might be a 'red herring'. If Joseph was illegitimate he might have given a fictitious father just to improve his status in the eyes of his bride
happy hunting
Bee