It's not needed to solve 8 (from what I remember!) but can happen accidentally as you're shuffling things around. I won't spoil 7 for you, but lemme know if you want another hint in due course :)
Awesome!! Nothing you said contained the idea, as far as I could tell, but however it happened you got me thinking about possible mechanics I was missing, and the one possibility that dawned on me was the way to solve it. Thank you!
