The PDFs with answers belonging to Basic Progressions and Dictations show track numbers. Why are they there?
Some people like to burn the ear training exercises to an audio cd, so that they can use it in regular cd players in their car or in their living room. To do that, browse through the VMS data folder and go to VMS/Ear training/Mp3s. If you burn all mp3s from the B-series onto an audio disk, the track names on your print-out will correspond to the track numbers. This also applies to the D-series, the Dictations.