The Mallory tree is working wel, I think we can continue that Ross line down. I believe there might be Mallory Ross and Cheeley Ross (!!), sons of Mallory, son of Francis Ross. I found an ancestry tree that has them (with wrong parents for Elizabeth).
It's not just the uncertainty about the dates in Scotland and the sasine dates being taken for birth & marriage dates. It's two other issues:
- there is a record of David, probably son of Hugh Ross in Balbair, giving sasine in 1701. When "our" Hugh is not in Balbair, he's in Elizabeth City.
- more importantly, the DNA does not match.
Descendant of Rev. George & descendant of James P. are in a broad group that is very frequent, and have enough in common to say they shared a common ancestor ... A long time ago. Look at the spreadsheet and compare column by column, the values entered for each marker. You will see that there are at least 15 columns where the values are different. If we compared kits using the utilities on GEDmatch for example, and the visualizations they have available there, we'd see it more graphically, perhaps.
They do not have a recent common ancestor.