First - when the papers come, don't call her that they have arrived. Act like it's junk mail - just leave it. She has an idea when they will get there. Let her call you and ask.
She's angry now b/c you both were called on the carpet about your daughter. She's feeling angry b/c it makes her "feel" like a bad mother. That is tremendous guilt. Stay away...let her feel this. If you go near her it will be like pulling apart two pitbulls fighting each other. You'll get slashed and further alienate her.
If you get anymore compliments, just accept them. Women don't usually accept a compliment, just after they give one to someone else, it seems too fake. It seems like the other person said a compliment, back, just to be polite.