Why does a \pagebreak push the heading at the top of the next page down? To match other pages, I need to add \vspace*{-3\baselineskip} after the page break.
\documentclass[a4paper]{article}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{dsfont}
\usepackage{indentfirst}
\usepackage{fullpage}
\usepackage{titling}
\usepackage{fancyhdr}
\usepackage{graphicx}
\usepackage{epstopdf}
\pagestyle{fancy}
\setlength{\headheight}{0pt}
\setlength{\headsep}{32pt}
\setlength{\droptitle}{-4em}
\lhead{-}
\rhead{-}
\renewcommand\thesection{A-\arabic{section}}
\renewcommand\thesubsection{\thesection-\arabic{subsection}}
\renewcommand\thesubsubsection{\thesubsection \ \alph{subsubsection})}
\begin{document}
\subsection{}
\pagebreak
\subsection{}
\end{document}
\documentclass
to\end{document}
) that illustrates the problem you are reporting?