Daz,
The notes for Emin7 and G6 are exactly the same as you know. It doesn't matter what position you play the chords, they are still Emin7 or G6. What would make it one or the other would be the Bass player (if he played the G note it wud be a G6). On a piano the root note in your left hand identifies a G or E, on an organ the root note played with your foot. Kenneth Baker suggests the 1st inversion because it has the least finger movement to reach other chords (this would be my preferred position as well). This does not mean he taught it wrong. Since the logic in a Yamaha keyboard cannot know if you meant to play an Emin7 or G6 it assumes a G6 (since it has a G note on the bottom). I won't have access to my Roland keyboard manual till the weekend so I don't know how other keyboard mfgs interpret a G6. I suspect they aren't able to play this chord. I suspect that on my Roland ANY postion of E,G,B,D would be an Emin7. Maybe someone else, who is familiar with other keyboards, can chime in.
Starkeeper