Thanks for responding!
The notes are the wrong pitch. I've looked in the piano roll, there are no visible errors.
In the score I have entered these notes:
Dflat, Aflat, Eflat, G, Aflat These are all entered in the bass clef. There is a rest in the treble clef.
I see the notes I've entered on the score, I see the piano roll is correct, but when I playback what I have already written, I hear a Bflat along with or instead of the notes I have entered. My key signature is 4 flats, and I have not entered a B on my score at that point. It is happening in several parts of the score. It seems that it keeps happening when there are rests in the treble clef. It seems fine when I have notes in the treble clef. If this is the reason this is happening, how can I enter notes below middle C that are played with the RH in the top staff? If this is not the reason, what is?