Oh, my! He is acting out just like my xh did and yes, my xh's lawyer was a piece of work as well. Lawyers can spot a MLCer a mile away and there are some that will clearly take advantage of them because they are so screwed up. Trust me...your xh's lawyer is one of those that knows exactly what is going on and will milk him for all that he can...it's a shame because there are some really good ones out there just like your lawyer.
As for the children, I have two schools of thought: 1) he doesn't realize how old they are. Time passes very slowly for them and he can't accept that they are teens now and he may be reliving that particular age in his mind. Something may have happened to him during his early teens; and 2) it is also a control and appearance issue for him. He wants people to see him as dad of the year and very concerned about his sons. Unfortunately, your sons are old enough to be home behind a locked door for an hour or two.
I would continue to document because you are going to need to do so because he is going to continue to rebel again any and all rules, etc.
HaWho, I know you know this...but watch your back. He's desperate and may become even more so as things ramp up. I know you have a got handle on this situation, but know that we are here if you need anything.
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.