Wow, what more is there really to say. I think we will have to file an application for sainthood if you can retain empathy for this woman.
I gathered that decreasing the support was voluntary on your part. I suppose you could contact her lawyer in writing tonight and inform him that he and his client are clearly not on the same page and therefore you cannot agree to have the writing presented as you do not believe there has been a meeting of the minds. Maybe if you shared that little missive with him she could also work on finding a new attorney to come after you for the $20 a week reduction (or whatever it was).