TommyC & MikeK,

Thanks for response - not sure that I understand. The chords are all fine - the problem that I am getting is with the notation (the notes being added (and therefore played) as the melody line).

The uploaded sample is just an example for simplicity - the real piece is much more complex (but shows the same symptoms).

The only work around that I can currently see is to enter the whole piece in one key signature and manually enter all the accidentals as I need to.... I had just hoped I could avoid that.