When nightbot does Kappa from a command, it doesnt pull twitch’s default Kappa, but one from some random streamer. Heres a picture: http://i.gyazo.com/ede364d809910bfd63477f42cb8652a1.png This may be because the twitch streamer command reference is only Kappa aswell.
Thanks,
Sargasm_Gaming
edit: the random streamer page it pulls from is http://www.twitch.tv/vlogthunder