Hi,
I have BIAB 2020 and yes, real tracks keeps playing the wrong harmonies despite what I specify, even when I turn off Natural Arrangement. My issue is that we shouldn't be forced to work around such a weakness/flaw using MIDI. I feel strongly that Real tracks, which is really a stringing together of various chord samples, should be able to play these oft-used chords as written. Or at least we should have a feature where we can force the Real Tracks not to choose a chord with a natural 9 or 13, when we specify b9 and b13.