It's time to resolve an enigma and I need your help. The enigma in question is this: Who arranged this album?
It's not a question easy to answer. Searching on the web, I've seen as arranger of this album to the following people: Shiro Sato, Reiko Nomura, Nobuo Uematsu and Shiro Sagisu.
There are diversity of opinions and I don't have idea what is the correct one. This mystery can be solved if someone has access to the liner notes, meanwhile I can only speculate.
This page
http://gamerseden.kir.jp/soundtrack/ff/ff6pf.html
is specially interesting 'cause explains the album's production process. Btw, it gives the arrangement credit to Shiro Sagisu.