Is my ex sending me mixed signals that she wants to get back with me?

My ex and I broke up about 2 months ago but after a month of us being broken up we decided to try and work things out. The problem was though that during our initial break she was sleeping with her high school boyfriend and she told me about it which killed me inside. We only lasted two weeks talking before it fell apart again due to me. However, my ex still kept trying to talk to me by calling and texting, she even invited me out to eat. So I decided to cut all ties from her cold turkey but the only thing left tieing us together was FACEBOOK. So for the past 3 weeks she has called me once a week and has randomly commented on some of my posts. I ignore it all because I am still not emotionally stable enough to even go down that route. The problem that I am having is her posts on facebook. She has posted things like, "your dead to me", "i'm the best, you'll never find better", and the most recent "i kissed a girl and i liked it, no i really did". These posts are driving me crazy but as much as I want to pick up the phone and ask her what the hell they are about, I don't. I do see myself with her one day being together again and even getting married but this recent activity is confusing, worrying, and even a turn off. I care about her more than just romantically but as a friend also and it worries me when I see stuff like that. I feel like she's just trying to provoke a response from me.