[WaifuApple]

Not to say that I know what's going on here, because I don't, but is it possible that going under 0% reduction (which is probably what Prinny has) leads to something weird where negative values aren't counted as negative?

Say, having -10% DR is just the same as having 10%. I might be wrong, but I suppose I figured I'd throw that out there, see if it helps at all.