Awesome, that helped a lot, thanks!
I have a few new problems, however:
For some reason, a lot of the beginning notes are showing up as hammer-ons. Any specific reason for that, and how do I change that?
The bigger and more pressing problem is that when I go make the changes you told me to make to my original midi file, it play in-game, but I'm not seeing any notes at all. When I use yours it works fine (although the first note isn't there, for some odd reason, and the above problem is there), but when I do the changes manually it isn't actually showing notes in-game, but the song is, in fact, running.
Here's the new notes file that I can't get to show notes. I'm sure I overlooked something small again: