Ah, so 1 CB was awarded to him, and CMS was awarded to you. Was it more than he was already paying, out of interest?
The impression that I got before was that you were incredibly angry that he was effectively ’winning’ more than anything else.
You tried to get extra CM from him, because you feel you do more and he earns more, so it would be fairer if he paid more.
He felt that he does as much as you, has the dc the same amount as you, so why should he? So he retaliated with the CB and is now challenging the CMS as well.
I’m not going to comment on the technical stuff. However, I would warn you about your DC. They are teens. They can choose where to go. Don’t get so focused on being angry with their dad that they start to feel uncomfortable at home with you.
Your DC need you to be making and keeping a warm loving home for them. If you get distracted by your anger at their dad, they may vote with their feet and stay with him full time.