I can also read your post with sympathy. Since we have not had much luck in the advocacy department I can only offer you support without the advice. Sometimes I am totally puzzled with how school administrators can actually believe what they are saying.
I actually got one this week in e-mail when I asked for copies of any assessments they might have done on DS6 to review prior to our placement meeting next week:
None of the assessments that I have would play a major role in our decision for placement for DS6, or any other child, for a future grade.
Seriously....