Originally Posted by Strether
I think there's a change in how the books are sorted on the Home screen. A particular author's books are now sorted alphabetically, and I don't think they were before. Perhaps others can confirm this. Maybe in the process, they fixed a bug that I'd noticed before where books disappeared from the Home screen and couldn't be "found" until you'd plugged the Kindle back into the computer with Calibre running.
True, that's how it looks on my PW now as well