After 4-18-18 update menuing system is cattywampus.

SanDisk MP3 players SanDisk® Clip Sport
2

Are you using FolderMode to play your music files?  Maybe take a look at the information in this recent discussion in this Forum.

   http://forums.sandisk.com/t5/SanDisk-Clip-Jam/Clip-Jam-files-not-in-alphabetical-order/m-p/352953/highlight/true#M346

Also, are you aware that all the player Firmwares released since Dec. 2015 only allow for cataloging up to 2000 music files in each Music database.??