Audiobook File Order

I have tried everything: renaming files and titles in order of use, making m3u file lists etc., but nothing works. It all ends up with files in seemingly random order. Sometimes only after I have added some more files to the mp3 player. Did they test it before putting it on the market? See:

http://kb.sandisk.com/app/answers/detail/a_id/14337/kw/audiobook%20jam%20clip/session/L3RpbWUvMTQ0NDIxOTUwNi9zaWQvdHh6dGJseW0%3D

http://kb.sandisk.com/app/answers/detail/a_id/8369/kw/audiobook/session/L3RpbWUvMTQ0NDIxOTUwNi9zaWQvdHh6dGJseW0%3D

The only way is not to play the books from “Books”, but to go to “Folder” and walk through the directory tree until you find the files you want to play.

A disadvantage is that you cannot change play speed and the file position is lost after you plug the mp3 player into the computer.