From what you have stated it's obvious that your ex-H has absolutely dropped the ball regarding his relationship with his children. Cancellations to a visitation schedule should be the rarity and it seems it has been commonplace with him. There is no excuse to put your children on the backburner and frequently cancel time that they know should be spent with them. In the courts it will not provide a very strong case for him to argue for more time.

That being said, I don't think I've ever heard of a visitation agreement which granted only 1 hour every other week for visitation to a parent. I don't know how anyone could stay connected to a child with only one hour of time with them every other week. Was this done due to documented abuse or based on his lack of involvement with your older two children? Admittedly, I do not know your entire sitch or your ex-H, but could it be he is starting to recognize his failings in the past and trying to re-engage by requesting more time with Ryan?

BA