Common tail, separate slurs

[Heikki Johannes Junes]

I wanted to write notes with common tail, stick or whatever, but with
separate expressive slurs. However, something went wrong, all slurs have
dropped to the bottom note.

altA = \notes \relative c'' {
  b4( )b c a
}

tenA = \notes \relative c' {
  g'4 e ( ) e ( ) e
}

basA = \notes \relative c {
  e4 g a c
}

\score {
    \context Staff <
        \context Voice = ii < \voiceTwo \altA \tenA \basA >
    >
    \paper { }
}
\score {
    \context Staff <
        \context Voice = ii < \voiceTwo \altA \tenA \basA >
    >
    \midi {
        \tempo 4 = 60
    }
}

--
      Heikki Junes