Nancy --
Thanks for presenting us with the opportunity to explore this question which relates to untold thousands of Confederate battlefield dead. I had purchased Professor Neff's book while visiting Oxford MS last year, but had not read it yet.
He also mentions the sad case of two Confederate dead (one thought to be from Alabama) unearthed on the battlefield in the 1930s. Since the GNMP director had no idea what to do with them, both bodies were literally shelved (that's what you do with most dilemmas like this).