🚀 go-pugleaf

I'm having some formatting problems with the following LaTeX file.
It's a skeleton for a new document that currently only has a chapter
and a series of sections defined.

    \documentstyle{report}
    \begin{document}

    \chapter{First chapter heading}
    \section{Section number 1}
    \section{Section number 2}
    \section{Section number 3}
    \section{Section number 4}
    \section{Section number 5}
    \section{Section number 6}
    \section{Section number 7}
    \section{Section number 8}
    \section{Section number 9}
    \section{Section number 10}
    \section{Section number 11}
    \section{Section number 12}
    \section{Section number 13}

    \end{document}

With 13 sections (may be different for A4 paper sizes), the "Chapter 1" 
appears in the proper place, but the rest of the page is empty and
"First chapter heading" appears on the next page along with the
section headings.  The formatting problem clears up if I have less
than 13 sections.

If I put some text after section 4, the chapter heading is properly
formatted, but I get a page break before section 5 even though there
is more room on the page.

I expect that this has something to do with the layout definition for
section headings, but I'm surprised that it separates the two lines of
the chapter heading instead of breaking between section items.  Is
there a simple cure for this? (..as you can tell, I'm a LaTeX novice)

Thanks, Gun\={a}rs

--
Gunars V. Lucans  --  gunars@spss.com  --  SPSS Inc, Chicago, USA