Whoever put
Metal Gear 2 together either misnamed so many tracks or the programmers themselves put the music in the wrong spots in the first place:
09 Tears - this is near the end of the game! What the hell is it doing at #9 (of 37)
12 Shallow (Swamp BGM) - this doesn't actually play at all at the swamp, this plays on the second floor of the first building, &...
16 Imminent (Alert Mode 1 Part 5) - plays at the swamp
17 Night Fall (Conversation Demo <Schneider>) - this does not play when you are talking to Schneider; it plays when you are talking to Holly (my favorite track by the way)
31 Spiral (Battle on the Spiral Staircase) - the biggest one; this actually plays when escaping Zanzibarland, &...
32 Escape (Escape BGM) - plays when on the staircase
I'm pretty sure there are more on this album (in fact, I'm real sure there are, but those are the obvious ones)