Not important, since it doesn't cause any problems, but I guess it 's ok to be reported. It may be more generic problem...
Actually it's more like "ban voting allowed" even when user was already off

It's basically just because there's a small gap between the last vote being cast and the guy (or girl!) being kicked off. It also means that someone is merely kicked from a server, but someone else starts a ban just before they are kicked off. But that serves them right for being a moron.