Find music files in subfolders

[mih]

Everything works fine, but I a bit not understand one moment

I have folder structure like

music
    album1
        album1_track1.mp3
    album2
        album2_track1.mp3
        album2_track2.mp3
    track.mp3
    track2.mp3

Album1 and album2 was recognized. But I don't see any places where I can find track.mp3 and track2.mp3. Is it ok?
The same situation with tracks in another subfolders, that contain folders.