Shari, this principal sounds very difficult child - she has impulse control issues, she is a micromanager, she lies (telling you that she and the teacher agreed on this, when the teacher had no idea) which also leads into me pointing out that she has obvious communication issues.
What she is doing does sound to me like she is trying to set Wee up for failure. If I were in your shoes, I would make it clear that this is what I think, and let her (should she choose to) try to prove to me that I am wrong in this thought. Because this guy was supposed to be there until the FBA was happening, and it's not happening yet. Plus he was only there for a few days, less than a week, wasn't it? Far too short for his presence to do more than merely manage the situation while he is there. I thought they were lso going to learn from him while he was there, and I don't think they had the chance, he was there for such a short time.
It would be very interesting for the super to ask para/teacher what happened. I'm betting principal has stepped in entirely on her own bat and taken control in areas where she should not. Super needs to put things in place in ways that the principal cannot undermine; she should apply to super if she has concerns, and super needs to then check the situation out for himself before letting principal have her own way. And THAT needs to go into the IEP!
Shari, don't let her have any wiggle room in this. Go for the jugular, this is your kid's success she has once again sabotaged.
Marg