Thanks, also.
Would have taken me a while to find that one.

That makes sense, as the notation mode display is based on actual midi event data,
as specified in the options, not on standard notation.

Since BIAB also has Staff Roll Notation mode for displaying actual durations,
it might be a good option for future version to display notes in Editable Notation
mode as if the notes were 100% duration, while preserving the actual durations.
For most notes in this mode, you can't see the actual duration anyway.