Inconsistent behavior with additional staves?

[Lovis Suchmann]

Hello everyone,

first: I'm new on this mailing list, so I hope I'm on the right place 
for my question:

today when working with LilyPond, I noticed some strange behaviour with 
additional staves. Have a look at the LilyPond code below. When 
interpreting this, the staves named "eigth" and "sixteenth" do not end 
after the end of the note but contine futher on. The staves named 
"full", "half" and "quarter" end after the end of the note as expected. 
I think you will be able to reproduce this behavior, i checked it with 
LilyPond 2.16 and 2.17.95. This inconsistency also happens in a slightly 
different manner when changing "\context" to "\new". I cannot see this 
is intended, so is it a bug?

(If someone is not able to reproduce what I'm talking about, please tell 
me...)

Thank you in advance :)

Lovis

[Lilypond Source Code below]
-----------------------------------------

\version "2.17.95"

\new Staff = "main" {

c''1 |

<<

\context Staff = "full" { c'1 }

\context Staff = "half" { c'2 }

\context Staff = "quarter" { c'4 }

\context Staff = "eigth" { c'8 }

\context Staff = "sixteenth" { c'16}

>> |

c''1 |

<<

\context Staff = "full" { c'1 }

\context Staff = "half" { c'2 }

\context Staff = "quarter" { c'4 }

\context Staff = "eigth" { c'8 }

\context Staff = "sixteenth" { c'16}

>> |

c''1 |

<<

\context Staff = "full" { c'1 }

\context Staff = "half" { c'2 }

\context Staff = "quarter" { c'4 }

\context Staff = "eigth" { c'8 }

\context Staff = "sixteenth" { c'16}

>> |

c''1 |

}