Ossia-like scordatura positioning question

[Menu Jacques]

Hello folks,

This is similar to an ossia, aiming at showing the scordatura graphically.

I don’t understand why the \new Staff shows up below the staff containing c’4, and not above it, which would be better I think.

Thanks for your help!

JM

\version "2.19"

P_POne_Staff_One_Voice_One = \relative {

  \key c \major
  \time 4/4
  \clef "treble"

  <<
    \new Staff {
      \hide Staff.Stem
      \hide Staff.TimeSignature
      \tiny
      <c' g f'>4^\markup {\bold "Scordatura"}
    }
    {
      c'4
    }
  >>
  \bar "|."
}

\score {
  <<
    \new Staff = "P_POne_Staff_One"
    <<
      \context Voice = "P_POne_Staff_One_Voice_One" <<
        \P_POne_Staff_One_Voice_One
      >>
    >>
  >>

  \layout {}
}