For her fake sister issue, I think it just went out of control. As far as I know she created Annabelle to get back to HCA. In a funny twist everybody soon trusted her and left their suspicion behind to the point of making her a moderator. I don't blame her for doing her best not to screw her chances at that moment. I think before she knew it she was already posting and making bonds with everybody as two alter egos. by the time HCA went down, she probably was afraid of the leash out and possibility of abandonment from the very friends she had made through those years. Also, Belle was taking over her online life. It is my impression people were generally more attracted to Belle than "her".They trusted better Belle than her. Belle had this trustworthy, mature and kind aura to her than PZ. I don't think she maliciously laughed behind our backs and was just trying to keep up the charade out of not wanting to face the consequences of us discovering the truth.
That's exactly what I think as well. "Annabelle" wasn't a trick; it was a tool. A tool that got out of hand. I can't help but wonder if the reason she eventually dropped out of sight was because she felt ashamed, and I would like for her to know that it's fine. We were all stupid kids, and I don't hold it against her.
There were a few times when I was talking to one sister, and the other sister would immediately know what we were talking about. I always just assumed they were sharing information. Was a total mindfuck when I found out they were the same person.
And no, I don't think she should have any issue with anything we've said here. Charlie might, but I doubt we'd invite him or that he'd want to hang out anyway. =P