I'm glad to read that your daughter is doing very well. This has to be good news for you and your daughter! Just think, she can now begin walking and doing the normal stuff in moderation until she's back on her feet 100%.
What you are feeling is perfectly normal. It's called confusion because he bounces in and out of your life and appears to actually be normal at times. One thing to help you keep on track...he's not indicated in any way a desire to return home and work on the marriage...that would be a factor in keeping me focused on my present situation.
I think your h is bending over backwards to ensure that his daughters have a great time at Easter. Maybe he wants to spend time w/them and then again, maybe he wants the world to see him in a good light...we just don't know. But I do find it interesting how he continues to text about the egg hunt even after your daughter told him she would need to check w/you. It's almost like he's a kid and is pushing his sibling to get "mom" to say yes. Quite interesting.
I do hope that you and your children will enjoy the holiday. You and your family have a lot to celebrate, i.e., the surgery went well and your daughter is on her way to full recovery!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.