A.A.
Well...I'm not divorced, I don't have to worry about custody, visitations, violations of court orders or much of what you described here, BUT I'm a child of all this nonsense.
I use the word nonsense, cause when you think about it...does it really matter if you meet at another location or if he has the kids for a couple of extra days? What's more harmful to the mental well being of your children; you and your ex getting along (even if it's not the exact court order) or bickering over insignificant battles.
Someone thought it would be better to take away his decision making when it comes to his children (could you imagine how that would feel??) instead of allowing him to be apart of the outcome of his kids lives. I'm sure he feels like he needs to control in any way possible (maybe not to get back at you) so that at a minimum he's not stripped of a part of parenthood.
My parents divorced when I was 6 almost 7. It was a 3 year divorce process as my parents fought the ENTIRE time over who was going to have custody and what control was allowed by each parent. The rest of time growing up my parents CONSTANTLY took each other back into court over the stupidest things just to "enforce" the court orders. My dad had custody so if my mom showed up late for a pick up he wouldn't let us go, if Mom spent too much money on her things Dad would take her into court looking for more child support. They had to sit on opposite sides of the audience for school functions cause they bickered so much over nonsense. They behaved selfishly not thinking of how their bickering was affecting their children.
Sorry for my harshness but stop worring about nonsense, go forward with your life and just get along. Even if it means going against court orders sometimes, being the bigger person here, and just compromise. Put the welfare of your children first!