Then why when I enable the "DRIVE" column under Jemplode, does it show all files including playlists as on drive 0?

From that FAQ entry that I linked:

There is currently no way to tell which files are stored on which drive without fishing through the FIDs by hand at the shell prompt. Plans to implement a feature for this in Emplode have been cancelled. The player currently does not care whether a given song is on /drive0 or /drive1, and will search both drives for files when retrieving songs.

So Jemplode should not even allow that column to appear since it is unused. That should be reported as a bug to Mike.