I certainly agree with your observation about life being full of contradictions. For what it's worth, the keeper of company records was the orderly sergeant, AKA 1st sergeant. Body servants were not enrolled, but cam along with their owner. Of course it was the responsibility of the owner to feed and clothe the slave, so when rations were reduced over time, those slave owners who remained in service sent their servants home. No sense in both of them starving.
Confederate law allowed for black musicians to be enrolled and paid. As I have mentioned before, FMoC who were employed to wash clothes, drive wagons or cook received pay from the Confederate government. Receipts are on record in Unfiled Papers and Slips because the unit is not usually identified.