Why was it working now? And why was it working with the key settings (FSN and NA)
set the ‘wrong’ way? Three of the five song versions had FSN and NA set to ON, when I was told turning them OFF would fix the problem!
...
Natural Arrangements is a Band-in-a-Box setting that can affect the phrases that are used when generating RealTracks. This is a global setting (in Options | Preferences | Arrange) or a song-specific setting (in Song Settings). The default is ON, since out of the box, and when using typical chords for the style you are working with, overall the RealTracks tracks generated will tend to sound most realistic - i.e. faithful to what a real pro musician would play when reading the chord chart. Also there will tend to be more variety, since there is more material to draw from. There used to be a flash message notifying you when you first generated your song, how many of the chords were re-interpreted based on this setting, however there were some people who didn't like the flash message and requested that we remove it.
If you have a LOT of chords in your song that have specific extensions, and you want Band-in-a-Box to always play those specific notes in your chord, you should turn N.A. OFF. Some prefer this set globally. MIDI tracks (that is tracks made using the StyleMaker, not MIDI SuperTracks) do not have this feature, but they work much differently than RT's. With MIDI you can throw in any note into a chord, but it's not going to be as realistic (not matter what your synth is), since it's just the computer playing samples of various note pitches and not a musician playing the music on their instrument in that style.