Well, let's see, Render-cutscene music all added up, we get:
Team Intros (#1-4?), Teams Dark and Chaotix meet (#5), Fake Eggman revealed for the first time (#6?), cutscenes before the fight in the jungle (#7-#8).
I'd take a stab in the dark and say Teams Rose and Sonic meeting was to be accompanied by music originally, yeah; that might bring it up to 9 tracks if we go by the file-name order as it is in the final game.
So, I guess pre-rendered cutscenes do add to the count somehow?
On a somewhat related note, a while back, I edited the Rose/Sonic cutscene to play the Time-Eater theme
to reflect the true horror Sonic feels upon seeing Amy
for the lulz.
EDIT: And I guess everything to do with the final boss in terms of music would come after #13, then. :V
This post has been edited by Herm the Germ: 25 February 2012 - 11:45 PM