Dear Muzak,
I'll skip the question of why there isn't such a setting for "All Notes." Actually, it suits me a bit because the notes in the tags are not alphabetical but based on the update date. So, I can see both alphabetical and update order at the same time. But guess what? I encountered another bug. I set "All Notes" as you suggested. However, at the same time, I want to check the "Reverse Sort Order" option because I want to see the most recently edited note at the top. But guess what happens. Even if "Toggle own sort order" is checked in some notebooks, some notes are affected by the "Reverse Sort Order" setting and they start sorting from "Z" instead of "A." I opened the support topic below about this bug: