Phantom User(s)?

Having just joined, I was skimming the forums and noticed something odd. Several threads show a “Kita Sparkles” as the last poster, but no post bi them exists in the thread. I can’t find any mention of them being banned or something, and I have to wonder what causes this and if there are other, less obvious examples…

Sorry, but due to the nature of this issue it cannot be commented on publicly or privately.