I find him listed as you did with both Howell and the NPS S&S site, with no additional info in either source.
I do not find him in MS CS Grave Registrations or MS CS Pension Applications (neither of which means that he wasn't a bona fide soldier).
I also noted a Simeon Carney (who may also be a relative)in the same company and unit.
With I could have helped you more! -- Jim Huffman, Gainesville Vols