I'm not clear why this merits another meeting. You were just following up on an action item from a previous IEP meeting. Maybe you could agree to meet if the principal thinks that there are issues for the team and then politely ask what issues he thinks still need to be addressed in the context of an IEP meeting so you can be prepared?
THis is an idea. I could say something like this to him. I mean, seriously, how does the team not understand "provide a scribe for multiple written sentences." They are making it so much harder than necessary - it is not in need of this much interpretation... just scribe for the kid, period - you don't have to worry about his stamina or his fatigue or anything. I am on that we have medical people and therapist galore doing that ... you just do your job, ie, teach and provide a scribe. Sheesh! I think he really doesn't like that I am documenting in writing that the IEP is being violated (I also think he got upset when the teacher response to me substantiated clearly that she is not following the iep consistently.
