Hi Mike J,
I agree with other other posters as well. You aren't out of line to be insulted by your wife's lack of communication. I'd feel the same way that you do.
Has your wife had a brain injury? That's the only possible reason that I can think of which would make these incidents more understandable. I've had a mild TBI, which often causes a complete loss of time, forgetting obligations, and miscalculating time. There are brain injury associations nation and worldwide, to help people work through common incidents like these.
http://www.biausa.org
If no brain injury, or illness caused your wife's behavior, I think that's pretty self-absorbed. You and your daughter's wellness should be some consideration to your wife. You shouldn't be expected just to sit around and wait for her to decide to join you. If your wife can't commit to joining you and your daughter, it's time to sit down and have a talk with her. Tell her how you feel. Ask that she call if she's running later than she expected. Just show some signs that she's thinking about you and your daughter by keeping appointments made with you. Not too much to ask for imo.