About time, Jon. We said months ago he could and should go to family law court to get a better order.
Child support orders are based on your time with the kids. If the kids are with you 25% of the time, you might pay $750 in child support. If you start spending 40% of your time with them, it's maybe bumped down to $300-$400. Once you start spending more than 50% of the time with them, you should petition the court to ask the other parent to pay.
Kate has also pretended that Jon isn't paying child support and that she needs Dancing With the Stars. $20,000 a month in child support isn't enough for you, Kate???