The reason you are only seeing a sustained A note is because of how i made that section of the midi.
I made the midi on a guitar tablature program called "Tabit", where you can control pitch bends by increments at any given time... I decided with the main synth parts for "These Walls", to try and replicate Jordan's portamento sound, i would just sustain an A note and punch in various pitch bends to simulate the notes actually being played.
I made these midis to be more palletable from a listener's perspective rather than from a practical (learning the song) point of view, so you will find things like this in alot of my midis. I had hoped things like this would translate into other programs when imported though, but judging from some of my feedback, they don't. I need to get a new transcribing/midi/writing/recording program, but the simple fact is that i can't afford one.
What i will do is tell you the notes, i guess:
Ribbon on last A, etc...
Capital A = A4, an octave lower than lower case a
hope i helped