When perfoming tied notes, the duration depends on a lot of context. I would argue that:
!NoteWorthyComposerClip(2.0,Single)
|Instrument|Name:"Flute"|Patch:73
|Rest|Dur:8th
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:0
|Note|Dur:8th|Pos:0^
|Bar
|Note|Dur:8th|Pos:0
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:0
|Rest|Dur:8th
|Bar
|Note|Dur:Half|Pos:0^
|Note|Dur:8th,Staccato|Pos:0
|Rest|Dur:8th
|Note|Dur:4th,Tenuto|Pos:0
|Bar
!NoteWorthyComposerClip-End
should actually be perfomed more like this:
!NoteWorthyComposerClip(2.0,Single)
|Instrument|Name:"Flute"|Patch:73
|Rest|Dur:8th
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:0
|Rest|Dur:8th
|Bar
|Note|Dur:Half,Tenuto|Pos:0
|Rest|Dur:4th
|Note|Dur:4th,Accent|Pos:0
|Bar
!NoteWorthyComposerClip-End
IMO, it is too much to ask of NoteWorthy to analyze this and make an intelligent choice.
It would, however, be nice to have an option to have the duration of a tied note be the same as if it were one combined note. NWC is quite hostile to missing bar lines. One can work around it with:
!NoteWorthyComposerClip(2.0,Single)
|Instrument|Name:"Flute"|Patch:73
|Rest|Dur:8th
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:0
|RestChord|Dur:8th|Opts:Stem=Down,ArticulationsOnStem|Dur2:4th|Pos2:0
|Bar
|Rest|Dur:8th
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:0
|Rest|Dur:8th
!NoteWorthyComposerClip-End
but it is such a kludge ...