Fix page counters when twoside

  % Call the ``section'' command, which will put the title on its own page

  \thispagestyle{empty}

  \@oldappendixsection{#1}

  % Increment page counter

  % Increment page counter only if one-sided document (not sure why this is

  % needed)

  \if@twoside\else%

    \stepcounter{page}%

  \fi

  % Add a blank page after the title

  \cleardoublepage

  % Insert the appendix name at the top, with no number, and centered