The birth dates for both Joseph's is listed as November 5, 1822, both list John Dobson as the father, both list Capt. Ephriam Jefferson Dobson as a brother, and both list a sister Nancy (though one Nancy is born in 1780 and the other is born in 1825 – clearly two different people). One profile connects to Rebecca (Gray) Dobson
(1797-1881) as the mother, and the other connects to Mary (Mackey) Dobson (1756-1845) as the mother. I doubt that Mary gave birth to Joseph Calvin at the age of 66!
However, I don’t think we should merge the two Joseph Calvin Dobsons too quickly. Looking at Joseph’s siblings, it appears that two families have been incorrectly combined. Were there really two Joseph Dobsons, one the son of Rebecca Gray and John Dobson, and the other the son of Mary Mackey and Capt. Joseph Dobson? Which children belong to each set of parents?
If you enjoy puzzles and are interested in untangling these two families, please jump in!