James Liberty Sutton (Sutton-15345) is my 2nd great-granduncle, son of my 3rd great-grandfather, Rev. James A. Sutton (Sutton-13018). Your Liberty Speed Sutton is older than my 3rd great-grandfather so I am not sure why you would think that James Liberty (his son) would be the same person as your Liberty Speed. Being that your person is a Sutton, I am sure there is a very real possibility that he is related (maybe their fathers are brothers?), but I do not think my information is incorrect. My 3rd great-grandfather was the first pastor of Youngs Creek Baptist Church and his direct line is pretty well documented. I have a patriot through his wife's line as well. I do not have a lot on his siblings (or anything on the siblings of his father) but the only older siblings I have found for him are female.
I don't have all the profiles created on WikiTree yet, as I have been wrapping up my last few classes for college, but I have been slowly migrating them over. The first six DNA matches you see under James Liberty Sutton are my close family, including my uncle.