1st level for pictures and videos, yes. it's bug, coz if you stay files and reflash, after booting you will see all levels in gallery and video.
so, also you can add paths to tracker manually:
tracker-control --index-file=/home/user/Pictures/mypictures
and be careful, if you scan rong folder by mistake, you will get tons of garbage in gallery, and your way to fix it will be very complicated, so, good luck!