Manami Ietel & Yuukichan's Papa I guess were put up with Ogeretsu Kun upon this album page's creation, back in that now seemingly ancient time when we thought all three of them did the music for MM2, which returns in this game unchanged. But since neither Matsumae nor Sakaguchi actually composed anything from MM2, they have no reason to be in the composer field.
Chris' earlier contact with Kimitaka Matsumae (
http://vgmdb.net/forums/showthread.php?t=1186) [posts 27 and 28] showed that Matsumae and Tateishi composed all the BGM of their respective games, and that Sakaguchi handled the Sound Effects in MM1 whilst Matsumae did them in 2.
However, as the interview I linked to in my earlier post showed, Matsumae and Tateishi created all the sound effects in their respective games along with the music. Sakaguchi was merely the programmer in both games. This makes sense as Yasuaki Fujita [3], Mari Yamaguchi [5], and Yuko Takehara [6] had to have created their own sound effects as well, due to their being the only sound-related names in their respective games' credits.
I guess Kimitaka meant the fact that Manami's sound effects were originally preserved in MM2 to be used again, as the interview stated (Thank God they weren't
).
Regardless, since the interview is from the sound team itself, Kimitaka's words are naturally less official than theirs.
The only question I have left is, why is Matsuame still credited for MM2 if she neither created nor programmed the BGM or SE [save 8 bars of Airman's Stage]? My guess is that the original intention of having her sound effects used stayed on record the entire time. Heck, one of them even managed to make it into the sound test [the old pause sound, to be specific]. According to Another Soundscape, Matsumae was credited for "re-used material from Rockman 1 that she was credited as the composer for," so I guess I've got the right answer.
http://www.youtube.com/watch?v=9kv7KLqE2ac - MM1 Sound Effects (at 0:02)
http://www.youtube.com/watch?v=is40JFgmijs - MM2 Sound Effects (at 0:03)