Glad this thread came up in a search.
This response helped me to understand how this style of layering works, as someone who has been using drawing apps, which function solely on the order that layers are displayed on a list (krita, et al). So, thank you for responding to their question, it was a very frustrating problem because it really felt like either I was missing something (which I was) or something was broken. -jj
edit: Wait this was AN HOUR AGO? It was like the fifth result on google. How