Hey Stony,

BIAB only supports 1 chord per beat. I'm sure you know about using a comma in order to have up to 4 chords per measure. You could also try to play around with the "Expand" or "Reduce" chord durations in the Edit menu or change some things in the bar by right clicking on the bar in question and then choosing "Bar Settings". This might be something for the wish list.

Hope that helps,
Ed