The help entry for Special Endings says:
This always seemed arbitrary to me. I don't see why the ties should look different in this clip:
!NoteWorthyComposerClip(2.0,Single)
|Rest|Dur:Half
|Chord|Dur:Half|Pos:-8^,-5^
|Bar
|Ending|Endings:1,2,3
|Chord|Dur:4th|Pos:-8,-5
|Rest|Dur:4th
|Rest|Dur:Half
|Bar|Style:Double
|Ending|Endings:4
|TempoVariance|Style:Fermata|Pause:0|Pos:5|Justify:Center|Placement:AtNextNote
|Chord|Dur:Whole|Pos:-8,-5
|Bar|Style:SectionClose
|Rest|Dur:Half
|Chord|Dur:Half|Pos:-8^,-5^
|Bar
|Ending|Endings:2,3
|Chord|Dur:4th|Pos:-8,-5
|Rest|Dur:4th
|Rest|Dur:Half
|Bar|Style:Double
|Ending|Endings:4
|TempoVariance|Style:Fermata|Pause:0|Pos:5|Justify:Center|Placement:AtNextNote
|Chord|Dur:Whole|Pos:-8,-5
|Bar|Style:SectionClose
!NoteWorthyComposerClip-End
I can work around it, but IMO, I shouldn't have to.