Checked the updated soundtrack... well, everything is fine now, thank you for listening.
As for the Koopa Village missing track... I checked and well...
I believe that the tracks for the Koopa Village are those: -Before the Fuzzy Boss Fight (in the OST) -After the Fuzzy Boss Fight (in the OST too) -Koopa Village Radio Song #1 (in the extra tracks) -Koopa Village Radio Song #2 (in the extra tracks too) -Koopa Village Radio Song #3 (in the extra tracks there as well)
Well... I think that all of them are there.
Looks like the soundtrack is pretty much complete and fixed now. As for the three remaining unknown tracks, I think they really are unused tracks in the game (the first could be a Forever Forest warning song used in the beta, the second is definitely the Chapter Clear fanfare beta version and the last is the beta version of the introduction theme).