@buzz that's very true. I suppose it's the case of someone being a keyboard user or a gamepad user for that system. Equally they'd have to know to setup specific controls for each game as well, so I guess it depends how nitty gritty you'd want to get.
Either way though having the config set as Retropad will always do nothing for some reason. But you're right, maybe it's something for libretro devs to fix than Retropie