Chemnitzer concertina music

I'm trying to get this software to work for concertina music. With the help of this forum I found a way to enter the concertina button numbers on top of each note or chord. They are entered as common lyrics below the staff and then moved up to the top. In concertina music, if a note or chord is repeated, the buttons numbers are shown as dashes. For some reason I'm not allowed to enter more than one dash in a row....it only shows one in the series. How can I insert multiple dashes in a row on the lyric lines?