In my view, they took something that was already a poor design (chord delineation using a comma), and made it more complicated by adding the 'micro-chords' functionality.
The correct approach surely would have been to allow a chord to be positioned anywhere in the bar, the same way that a note can be placed anywhere in the bar.
That's right. Everyone agrees.
How to let BIAB officials know that four bars can be input for each bar. It should not be difficult.