If you search in the library the order of lessons is not from “A to Z” that is ticked on. It seems it is from the oldest to the newest lesson.
Example:
Go to the library. Choose a level. Then click “Search”. You see “A to Z” is active. But the order is from the oldest to the newest lesson.
Vera is right:
The order is from the oldest to the newest lesson.
We’ll take a look at what’s going on here.