Looks like you've gotten good advice, which I would echo -- make a post (as straightforward as possible) on G2G. Don't try to solve the world in one go, just try to ask for second opinions, one relationship at a time. What is the core disagreement? What sources support your position? What sources support the other position? Are there additional sources not yet in view that could help clarify?
We all have a stake in accuracy, not just profile managers and descendants. Anyone should be able to weigh in, dispassionately, based on sources alone, not favouring one outcome over another.
If ultimately there is not enough evidence to make a firm conclusion either way, detailed Research Notes can be made, relationships marked as uncertain, etc., as appropriate.
I'll also add that DNA evidence is helpful, but must be used carefully in conjunction with traditional genealogical evidence. If my second cousin on paper is shown to be my second cousin on a DNA test, we probably can say we share the same great grandparents, but we need the traditional genealogy piece to tell us WHO those great grandparents are.
Lastly, I wonder if the profile in question would be of interest to Wikitree's US Southern Colonies Project or the 1776 Project. Maybe they could help get it sorted.