Fixed issue with one-sided layout

main.tex

@@ -84,6 +84,8 @@
 
 \frontmatter
 \pagenumbering{roman}	% set page numbers roman
+\pagestyle{onesided}
+
 % Preface not required
 % \iftoggle{PrintVersion}{
 % 	\input{chapters/00_Preface}
@@ -121,6 +123,7 @@
 % ------------
 \mainmatter
 \pagenumbering{gobble}  % disable page numbering
+\pagestyle{onesided}
 
 \cleardoublepage
 \setpartpreamble[u][\textwidth]{