Possible Duplicate:
ToC numbering problem
My LaTeX document is acting strangely. Here is a simplified version of it:
\documentclass{article}
\begin{document}
\tableofcontents
\newpage
\addcontentsline{toc}{part}{A Part of My Document}
\include{includedfile}
\end{document}
And in includedfile.tex:
\section{My Section Title}
Quack.
Clearly, in the table of contents, the heading for the part should precede the one for the section, but it doesn't! What's wrong?