I'm using titleps for my masters thesis. When I change the displayskips as per this answer the headings become offset. Without using rubber spacing the headings are only minimally offset. I would really appreciate some advice, please.
\documentclass{book}
\usepackage{blindtext}
\usepackage{etoolbox}
%%%%%%%%%SPACING%%%%%%%%%%%%%%%%%
\apptocmd\normalsize{
\setlength\abovedisplayskip{.5cm plus .1cm minus .1cm}
\setlength\belowdisplayskip{.5cm plus .1cm minus .1cm}
\setlength\abovedisplayshortskip{.1cm plus .1cm minus .1cm}
\setlength\belowdisplayshortskip{.5cm plus .1cm minus .1cm}}{}{}
%%%%%%%%%%%%%%PAGESTYLES%%%%%%%%%%%%%%%%%%%%
\usepackage[pagestyles]{titlesec}
\newpagestyle{main}[\small]{
\setheadrule{.3pt}
\sethead[Chapter \thechapter][][]
{}{}{\thesection \, \sectiontitle}
\setfoot[\thepage][][]
{}{}{\thepage}}
\pagestyle{main}
\begin{document}
\Blindtext
\end{document}


