the interaction of \paper spacing variables

[Kieren MacMillan]

Hello, all!

I'm using 2.15.14, and finding certain \paper variables not working as I would 
have thought.

Manually forcing line and page breaks, I found a format I like: 1 page of 3 
systems, then 4 pages of 4 systems each, for a total of 19 systems over 5 
pages. So I inserted a \pageBreak where I wanted it in the music, and then used

\paper {
  system-count = 19
  page-count = 5
}

This did not accomplish what I wanted — in fact, I ended up with 8 pages [!!].
Why doesn't this work? Is there anything I can do to get what I want, short of 
manually forcing the line and page breaks?

Thanks,
Kieren.