I read up on the settings as for the subject above and I think I understand what it's about...but...

Just as an example, in a 32 bar standard tune with 4 bars of Eb being the desired sequence (bars 17-20), BIAB insists on playing (Eb, Eb9, Eb, Eb9) as a variation which I just don't need or want.

BIAB is not just adding a passing chord as a segue to the next chord, by the way, its changing the nature of the desired chord.

So, I experimented with ''simple'' and ''freeze'' and it still persists in playing its variation, which does not fit the fairly uncomplicated melody, so I'm baffled.