Look at this clip in Print Preview. NWC2 (correctly) does not add extra space the front of the first note in each line. But this should also true for the first note in all other measures. This is an unsightly bug (that also exists in NWC 1.75b). Typeset music handles this correctly; NWC2 should as well.
I won't call this a bug, but IMO, NWC2 should not add extra space to invisible notes/rests either.
!NoteWorthyComposerClip(2.0,Single)
|Clef|Type:Treble
|Key|Signature:C|Visibility:Never
|TimeSig|Signature:4/4
|Note|Dur:16th|Pos:3|Opts:Stem=Down,Beam=First
|Note|Dur:8th,Dotted|Pos:5|Opts:Stem=Down,Beam=End
|Bar
|Chord|Dur:Half|Pos:1,3,6
|Chord|Dur:Half|Pos:0,2,5
|Bar
|Chord|Dur:Half,Dotted|Pos:-2,1,3
|Note|Dur:16th|Pos:3|Opts:Stem=Down,Beam=First
|Note|Dur:8th,Dotted|Pos:5|Opts:Stem=Down,Beam=End
|Bar
|Chord|Dur:4th,Dotted|Pos:6|Opts:Stem=Up|Dur2:Half|Pos2:1,3
|Note|Dur:16th|Pos:7|Opts:Stem=Up,Beam=First
|Note|Dur:16th|Pos:6|Opts:Stem=Up,Beam=End
|Chord|Dur:Half|Pos:0,2,5
|Bar|SysBreak:Y
|Chord|Dur:Half,Dotted|Pos:-2,1,3
|Note|Dur:16th|Pos:1|Opts:Stem=Down,Beam=First
|Note|Dur:8th,Dotted|Pos:2|Opts:Stem=Down,Beam=End
|Bar|Style:Double
|Chord|Dur:8th|Pos:2|Opts:Stem=Up,Beam=First|Dur2:4th,Dotted|Pos2:-4,-2
|Note|Dur:16th|Pos:1|Opts:Stem=Up,Beam
|Note|Dur:16th|Pos:1^|Opts:Stem=Up,Beam=End
|Note|Dur:8th|Pos:1|Opts:Stem=Up,Beam=First
|Chord|Dur:8th|Pos:2|Opts:Stem=Up,Beam=End|Dur2:8th|Pos2:-3
|Chord|Dur:4th|Pos:-3,2
|Chord|Dur:16th|Pos:-4,1|Opts:Stem=Up,Beam=First
|Note|Dur:8th,Dotted|Pos:3|Opts:Stem=Up,Beam=End
|Bar
!NoteWorthyComposerClip-End