Calliope Lead Expr. Sound Bug
When using Calliope Lead Expr. (Calliope Lead works fine, for some reason) and there is a tied note across a bar line it will be played twice. Once when the note is supposed to be played, and again when it crosses the bar line.
Comments
Be sure you are not using a slur in place of a tie.
Otherwise attach the score, state what soundfont.