So today I was kicked out of a lobby for being a smurf, which I'm not. The accuser smurfchecked me and told me that I had seven accounts. So I smurfchecked myself and indeed saw seven IDs (see attachment), one of which is me. I don't care much about making him believe in my innocence (although that would be nice) but this is obviously a problem.
Now I'm not tech-savvy but could the culprit be today's update? The changelog said "The improved one-account-per-machine system (a.k.a. UID system, a.k.a. smurf check) has been improved". I couldn't find if this has happened before but if it hasn't, that seems like the most obvious solution to me. What I can tell you is that I'm the only one in my house to have played this game, so several PCs logging in over my IP shouldn't be the problem (but again: I hardly know anything about tech stuff).