Usb Dn-s1200 usb help

Hi all, I recently bought a pair of usb denon dn-s1200, I’ve uploaded my tracks to usb, but not all of the tracks show maybe 10 out of 100 show, can anyone help me out? Does denon have a similar program to pioneers rekordbox? Also the bpm jumps like crazy.thanks.

The dns120o will not show all music song formats types. Only popular

Best to use mp3 or wavv