hi @olibclarke ,
I went down a symmetry expansion rabbit hole somewhat recently, and unless you re-do the half-sets, my understanding is they should stay together (see here, which was 2021, so not sure how far back you’re referring to).
Interestingly though, I was trying to make some egregious FSCs for a presentation I was giving recently, and it was surprisingly difficult, even with high symmetry and re-doing half sets, to make some of the curves I was trying to make. I was hoping it would be a little more obvious when you do something terribly wrong 