Care to explain the authentic and conclusive-sounding quotation from Dr. Steiner, about the 3,000 armed black men in Jackson's Corps in 1862? Or will you suggest to us now that henchboys and bottle-washers customarily carried LeMats to help them with the horses and the dishes?
I don't know the source because the article's author didn't provide it and neither did you, but there are numerous possible explanations (drunken witness, muddy/tanned faces, bad visibility, Confederate soldiers using negro slaves as mules to carry their weapons, etc.)