I am guessing they were brothers, the names of their children show similarities. Joseph died in Jefferson County New York and sometime later Bethania and a few of her sons moved to land near Glenbulah, Sheboygan County, Wisconsin. Last summer I found Bethania Pettet's grave and the grave of her son my GGGgrandfather Ozias Pettet.
I have stopped at Joseph Pettet since I am unable to locate any further information on him. I think he may be the son of Timothy Pettet of New York.
In regards to the lost story It was interesting when I started searching the family tree and I was told we were decended from Native Americans (which I haven't found anything), to see how a story chages over time is amazing.
Have you gone further back with your side? I would be happy to add any of your information to my ancestry program, and would also share anything that would benefit you.
My email is firstname.lastname@example.org