Funny, but still a very opaque policy. As far as I could tell, qqq was for criticizing your comments related to Israel, and xlnt was either for what qqq did or for having a new account. Is that right?
It would have been because you used the same ip address as both curi and one or both of them.
Edit: Usually that's how the software catches multiple accounts belonging to the same person, but I went back and looked, and in this case you (as qqq) outed yourself as curi.
I'm a little confused. I did not reset my modem or anything when making this account. I don't see why it wouldn't have triggered the same thing. And also, wouldn't the accounts get banned right away, not at a random time later? Did my ISP one day just happen to give me the same IP I had months ago?