2 eigth notes act weird

[Marko Graulić]

I am trying to do some quartet music. All my voices I hold in separate variables and then use them. This is my code:

\score{
  <<
    \new Staff
      \global
      \new Voice = "tenorI"
        \tenorI }
      \new Voice = "tenorII"{
        \tenorII }
     new Lyrics \lyricsto "tenorII" {
          \kiticaI } >>
    \new Staff <<
      \global
      \new Voice = "bariton"{
        \bariton }
      \new Voice = "bas"{
        \bas } >>
  >>

In tenor parts I have two eight notes: I want to connect flags (if that is a good name for that). This looks like it's sixteen note.

Can you help me?

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