@cahrens The "fixed" feature just supports elements grouped at the start and end (e.g. "all of the above"). This was the consensus design back when we were coming up with it. I checked that this behavior is in the docs I sent Mark Hoeber, and it is. At some point a reviewer asked me to add a test for the actual behavior -- that fixed choices in the middle get lumped with the end group, so I added that too.