I've noticed this for a while, but never really thought much about it, until I bought a new keyboard the other day. In device manager, under keyboards, I have five HID keyboard devices listed, along with my mouse for some reason. Under mice, I have two HID-compliant Mice listed, and my Razer Deathadder Chroma, which is also listed with keyboards. I personally have no clue as to why this would be, but it certainly seems redundant. My new keyboard isn't listed at all, but when I unplug it with device manager open, I see two of the HID keyboard listing go away. I haven't tried that with my mouse, but I suspect it might yield a similar result. If it is of any importance, my new keyboard is a Corsair STRAFE. Thanks.