You might try these:
!NoteWorthyComposerClip(2.751,Single)
|Instrument|Name:"Flute"|Patch:73|Trans:0|DynVel:10,30,45,60,75,92,108,127|Pos:7
|Note|Dur:4th,Grace,Slur|Pos:2
|Note|Dur:4th,Grace,Slur|Pos:1
|Note|Dur:4th,Grace,Slur|Pos:2
|Note|Dur:4th,Grace,Slur|Pos:1
|Note|Dur:4th,Grace,Slur|Pos:2
|Note|Dur:4th,Grace,Slur|Pos:1
|Note|Dur:4th,Grace,Slur|Pos:2
|Note|Dur:4th,Grace,Slur|Pos:1
|Note|Dur:4th|Pos:1|Opts:Muted
|Bar
|Rest|Dur:4th
|Note|Dur:4th,Grace,Slur|Pos:2^
|Note|Dur:4th,Grace,Slur|Pos:2
|Note|Dur:4th,Grace,Slur|Pos:1^
|Note|Dur:4th,Grace,Slur|Pos:1
|Note|Dur:4th,Grace,Slur|Pos:2^
|Note|Dur:4th,Grace,Slur|Pos:2
|Note|Dur:4th,Grace,Slur|Pos:1^
|Note|Dur:4th,Grace,Slur|Pos:1
|Note|Dur:4th|Pos:1|Opts:Muted
!NoteWorthyComposerClip-End
Make the grace notes Visibility:Never. I left them visible so you can see what is going on.