In an attempt to work around the issue described in my Pt1 post, I went back to the song details and reset the transpose slider to 0 (no transpose). The chords do not change.
If I the turn off the switch ‘Apply to Chords’, the chords of course go back to their original settings of Key E (as per what is in the editor)
I would expect taking a chart that is in key of G and moving the transpose slider from +3 to 0 would move the key and chords back down to E. It does not.