Well, I wouldn't worry about it really, what's important is whether you're pleased with them (and you should be).
I've been thinking about 'uniform accuracy' a lot recently and I've basically decided that it's not important at all. Once you get past a general look for the figures, in this case dark blue coat, light blue trousers and black hat (with variations), than everything else really doesn't matter. Sources disagree on everything so you'll probably never be right anyway. Since there are already arguments about what people wore and carried in Vietnam there are certainly many innaccuracies in every uniform book about earlier times.
I am now happy to paint figures to an accepted colour scheme and with enough 'correct' detail to satisfy myself. Anything further I make up. It saves a whole lot of bother.