Yes it’s because each time an example is given the file name does not merely include the track number: it actually begins with the track number, which is not very convenient. And why is that ? Because the player truncates the file names … apparently it considers only the 24 first letlers (Green Day - American Idi).
The track numbers is therefore not considered with our file names (yours and mine). And for a strange reason the first file appearing in Folder mode is the track number 07 then 08, 09, 10, 11, 12 and then 01 to 06. All appearing as Green Day - American Idi …
Further I understood that “folder play” implies creating a folder for each album, which is not very convenient either. If you put all the files in a single folder, yes it should work … if the track number is in the first 24 letters of the file name.
Anyway … let you see if your files are in the correct order and please give me your feedback (MP en français ce sera plus simple pour tout le monde).