Band In A Box is not designed to follow a pop style song form as in Verse - Prechorus - Chorus - verse - prechorus -chorus - bridge - chorus - etc...
It follows a traditional jazz and blues form where a chorus means one time through the entire main section of the song. Then it allows you to add repeats of the chorus, intro, tag, ending and such.
Best to expand to one big chorus and ignore BIABs use of the term "chorus". 100 bars is usually enough for a moderate tempo song.
But, as you build the song you might find it helpful to keep the bars to a minimum for faster regeneration up to the section you are working on.
Set your final last bar when you approach completion.
Most of my songs are done this way.

You can use Bar Based Lyrics to designate your form.

Many styles allow you to change the drum pattern and rolls used by right clicking on the A or B part marker.

The A Blue and B Green part change markers are used to change the A - B style for verse and chorus and to force a drum roll just before the part marker.

To create a blank bar or blank beat's in a bar insert a chord with a period and make it a rest. "C." It will rest until your next chord.

Right click on the bar for more on bar settings.
right click on the blue or green substyle part marker for more on drum pattern and other choices.

Does the noise in your head bother me ?