G'day Bob,,
this is true, but you can fake it with layering. Here's a Quick and Dirty...
Staff 1:
!NoteWorthyComposerClip(2.0,Single)
|Clef|Type:Treble
|TimeSig|Signature:4/4
|Note|Dur:16th|Pos:-6|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-5|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:-4|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:-3|Opts:Stem=Up,Beam=End
|Note|Dur:16th|Pos:-2|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-1|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:0|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:1|Opts:Stem=Up,Beam=End
|Note|Dur:16th|Pos:1|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:0|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:-1|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:-2|Opts:Stem=Up,Beam=End
|Note|Dur:16th|Pos:-3|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:-4|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:-5|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:-6|Opts:Stem=Up,Beam=End
!NoteWorthyComposerClip-End
Staff 2:
!NoteWorthyComposerClip(2.0,Single)
|Clef|Type:Treble
|TimeSig|Signature:4/4
|Note|Dur:16th|Pos:-6|Opts:Stem=Up,Beam=First,Muted
|Note|Dur:16th|Pos:-5|Opts:Stem=Up,Beam=End,Muted
|Note|Dur:8th|Pos:-4|Opts:Stem=Up,Beam=First,Muted
|Note|Dur:8th|Pos:-2|Opts:Stem=Up,Beam=End,Muted
|Note|Dur:16th|Pos:0|Opts:Stem=Up,Beam=First,Muted
|Note|Dur:16th|Pos:1|Opts:Stem=Up,Beam=End,Muted
|Note|Dur:16th|Pos:1|Opts:Stem=Up,Beam=First,Muted
|Note|Dur:16th|Pos:0|Opts:Stem=Up,Beam=End,Muted
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam=First,Muted
|Note|Dur:8th|Pos:-3|Opts:Stem=Up,Beam=End,Muted
|Note|Dur:16th|Pos:-5|Opts:Stem=Up,Beam=First,Muted
|Note|Dur:16th|Pos:-6|Opts:Stem=Up,Beam=End,Muted
!NoteWorthyComposerClip-End