1) When will she stop being STBX? I think you need to rename her. You've got a relationship after her under your belt and she's still only "soon-to-be" ex? She IS ex in all but the law. Move her someplace else in your mental space.
2) Why were you disappointed she didn't tell you she was signing early? I feel like you're still looking for some acknowledgement from her. You will not get it. People rarely feel shame or even much guilt unless something compels them to. Nothing is compelling her to consider her actions wrong. See 1) above.
3) AVOIDED YOUR CHILD??? Mozz, is that who you want to be? I'm so disappointed in you. What if she saw you trying to avoid her but you didn't realize it? Do you want to deal those hurts? Pull on your big girl panties, man!!! You can look straight through OM like he's not even there and greet your daughter like the precious gem she is. He's nothing. I know this can be done because I've done it and it made me stronger. I hope you never pull cr@p like that again. Genghis Khan himself shouldn't come between you and your children.
You're not ready to date till you're not even tempted to act like that. You don't have to like the guy but for sure don't give him (or the ex) that kind of power in your life. Move on first. Then date.
Me42, H40 D12, S8, S7 A revealed: 7/13 Sep 4/14; Agreed to D 1/15