I just checked the album page and saw this:
M07-M10
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Composer: Masato Nakamura & Izuho Takeuchi
Since when was Takeuchi a composer? She's merely a sound assistant along with Yukifumi Makino, Hiroshi Kubota, Milpo, Sachio Ogawa, Oyz, and Masayuki Nagao. Nakamura is by himself once again.
http://www.youtube.com/watch?v=-VWhAidfaB8#t=4m48s
*Tomoyuki Shimada also replaces Hiroshi Kubota and Yukifumi Makino as Sound Programmer in Sonic 2, so wouldn't that make "Sound Assistant" almost the same thing as Sound Effects, at least in the case of Kubota and Makino? Furthermore, the credits that already exist prove that Nakamura didn't do any of the actual programming. Between all that and the in-game distinction I demonstrated above, that's why I think Nakamura only did music while the other two did sound effects as well as programming.
[In other words, Sound Program (S1) = Sound Programmer + Sound Assistants (S2)].
On that note, M23 is basically just a sample-sized version of Cuts Unleashed, with all 8 vocal themes played in a medley of sorts, and in the same order, no less.
http://www.youtube.com/watch?v=e1fIQau3Tr4 - SA2 Vox Trax
.....
Well, regardless, I basically answered my own questions, so a confirmation of ICEKnight's findings is no longer necessary. The draft you see here and in the other thread (
http://vgmdb.net/forums/showthread.php?t=3511) is officially my final draft. You may use it as you see fit, as long as you remember that it is by no means official; it's just research.
Thank you.