I don't quite get why CS was even a topic of mediation. At least here, there's the state guideline, and you can negotiate up, but to go down is going to take some pretty special circumstances. So I would say the mediator did you no favors if you were counting on that. Which of course sets off the whole chain reaction of hosing.
The good thing is that's it's all temporary. It sucks for now, but it will pass.
