OK, simple.
There are 2 versions of the song
One arranged by Yuushi Matsuyama and one by Takeo Watanabe
One is used as anime version, the other one for radio/drama & movie
It's explained on Wikipedia
https://ja.wikipedia.org/wiki/%E8%B5...83.A1.EF.BC.89
and here:
http://www.sun-inet.or.jp/~miura/takeo/m72a10.html
But then things get confused on who did arrange the versions... must check lyrics on this release to understand if we have the movie or tv version...