Thank you so much for the quick reply! The code for my layout layer is here, and the code for my theme layer is here.

That makes sense for #2, and would explain why I remember having cut-tag expansion arrows before. I really appreciate you checking with the dev on that!

Pardon my ignorance, but I can't figure out where to add the max-width phrase in my theme layer. If you end up taking a look at that layer for the other issues, would you mind pointing me in the right direction? Sorry to be a bother!