headers and spacing

[David Bobroff]

I posted a query about changing running headers.  I received a useful 
response but then noticed that I needed to alter it a bit.  I put this 
in my \paper{} block to have the title top centered on pages after one 
and also to retain the default page number placement of LilyPond.  All 
is well except that when I use this the spacing gets fouled a bit.  I 
saw this in titling-init.ly:

  %% force the header to take some space, otherwise the
  %% page layout becomes a complete mess.

So my current thinking is that I've somehow not managed to do this.  Is 
there some adjustment that needs to be made in the following?



\paper {
        myTitle = "Title"
        myInstrument = ""
        oddHeaderMarkup = \markup
        \fill-line {
                " "
                \on-the-fly #not-first-page {\column {\myTitle \tiny 
\myInstrument}}
		\on-the-fly #print-page-number-check-first \fromproperty 
#'page:page-number-string
        }
        evenHeaderMarkup = \markup
        \fill-line {
		\on-the-fly #print-page-number-check-first \fromproperty 
#'page:page-number-string
                \on-the-fly #not-first-page {\column {\myTitle \tiny 
\myInstrument}}
                " "
        }
}