Try to explicitly give the openany option for your document class. My guess is that, even if you didn't specify it, your document class is using a default of openright.
There are two and a half solutions (only the second one is valid if you need to use \include):
- Use
\input instead of \include (if you don't need the functionality of \include).
- Put
\appendices into appendixA.tex.
Manually configure the TOC file from
\contentsline {chapter}{\numberline {1}First things}{1}
\contentsline {chapter}{\numberline {A}The initial stuff}{3}
\contentsline {section}{\numberline {A.1}A section within the initial appendix}{3}
\contentsline {chapter}{Appendices}{3}
\contentsline {chapter}{\numberline {B}Another addendum}{5}
to
\contentsline {chapter}{\numberline {1}First things}{1}
\contentsline {chapter}{Appendices}{3}
\contentsline {chapter}{\numberline {A}The initial stuff}{3}
\contentsline {section}{\numberline {A.1}A section within the initial appendix}{3}
\contentsline {chapter}{\numberline {B}Another addendum}{5}
The package manual states:
There is an unfortunate interaction between the LaTeX kernel commands \include
and \addcontentsline. […]
Things work as expected if the \addcontentsline command is placed
within the \included file, or if the imported file is \inputed instead of \included.
On another note: appencides is an environment not a macro, so you better use \appendices … \endappendices or \begin{appendices} … \end{appendices}.
Best Answer
Add
\makeatletter\@openrightfalse\makeatotherto the preamble.