According to that article, a good number of the people who were claiming to be racially Native American did not have that reflected in their DNA tests. Wikipedia says the Black Seminoles lived alongside the Seminoles but did not share religion or language. Your article reinforces the other article I posted that said this all stems from the rules about the Dawes Roles, the White racism at the time it was created, and the rules back then about people being either Black or Native American, but not both.
So you haven't proven your case, in the slightest, and you're still avoiding the question about why you would bring this up in the first place.
But you gave me a hearty laugh, so thanks.