Odd layout choices

[Guy Stalnaker]

All,

Sometimes Lilypond changes how it does its "Fitting music on ..." 
calculations when it decides what can fit on a page and what cannot. In 
this case, after four pages on which the "fitting" process puts two 
systems per page, the subsequent pages *all* have only one system per 
page--even though there is no change in number of staves -- still seven 
(SATB plus organ). The links below to the Lilypond code and resulting 
PDF show what I mean. Now, I know I can fiddle with the margins and 
likely get Lilypond to fit two systems per page throughout, but this 
just seems so odd. Why can two seven-stave systems work for four pages 
but not for all remaining pages?

https://www.dropbox.com/s/cr26k3jlkxwg6s1/psalm46.pdf
https://www.dropbox.com/s/tjbf7sdudia6zpy/psalm46.ly
https://www.dropbox.com/s/zqoxjruc80door8/psalm_46_organ.ly
https://www.dropbox.com/s/gcugottr7fukoxv/nak_standard_header.ly

Verbose logging provides no guidance as, well, there's technically been 
no error. In order to get two systems per page through out, I have to 
set-global-staff-size to 14 and decrease all margins thus:

  top-margin = 1.0\in
  bottom-margin = .75\in
  right-margin = 1.0\in
  left-margin = 1.0\in

Which is, well, odd. To me at least.

Regards,

Guy

--

"There is only love, and then oblivion. Love is all we have
to set against hatred." (paraphrased) Ian McEwan

Guy Stalnaker
address@hidden