Oh, I forgot that this mix originated on Made In The USA.
I haven't seen the Big Chill in forever and don't remember what version is heard on that (probably duophonic). But the alternate version heard on Made In The USA/Still Cruisin' was used in place of the single version because the master for the album/single version had been damaged (possibly lost as well). Here's a thread about it:
http://smileysmile.net/board/index.php/topic,2452.0.htmlI think because Made In The USA was one of the first BB CD's, it took a while for this mix to get replaced by the "real" version. I remember it was also used on The Wonder Years and other TV shows/movies.