Yeah I'm with Mickey, number 1 would trouble me too.

The divorce/kids access seems a normal reaction from him to me, and think that's something you have to decide if it's for you or not.

Not contacting/responding I think I would ask him gently, it may be he's not even aware that he's not responded if he's caught up in thoughts about something else. I would tread gently here though.

Yeah, yellow flags seems a healthy way to view this. Good luck!