When I select 2 rows x 2 columns single booklet it just duplicates the pages. Is that the expected behaviour? So for printing on A4 paper I can create an A5 booklet or TWO copies of an A6 booklet, but not one copy of an A6 booklet. This seems very wasteful.
PdfBooklet has been designed this way because this function is only used for multiple copies of a booklet.