Again associatedVoice in 2.10.10

[Georg Dummer]

Hi all,

Again I couldn't figure out how to cope with "associatedVoice".
Why is the syllable "sau" aligned to 'c' and not to 'a'?

Thank you 
Georg

<<
  \relative \new Voice = "lahlah" {
    \set Staff.autoBeaming = ##f
    c4
    <<
      \new Voice = "alternative" {
        \voiceOne
          % show associations clearly.
          \override NoteColumn #'force-hshift = #-3
          g'8 g16
      }
      {
        \voiceTwo
        r8 g16
        \oneVoice
      } >>
    a8( b) c
  }
  \new Lyrics \lyricsto "lahlah" {
    Ju -- ras -- sic Park
  }
  \new Lyrics \lyricsto "lahlah" {
    % Tricky: need to set associatedVoice
    % one syllable too soon!
    \set associatedVoice = alternative % applies to "ran"
    Ty --  ran --
    \set associatedVoice = lahlah % applies to "sau" but too late
    no --  sau -- rus Rex
  } >>