Randeinstellung nicht konsistent

Randeinstellung nicht konsistent

Ich tippe gerade meine Dissertation. Die Textränder sind oben 2 cm, rechts 2 cm, links 4 cm und unten 2 cm. Meine Einstellung funktioniert für alle Seiten, außer für die Seiten mit den Kapitelüberschriften. Gibt es eine Möglichkeit, das Problem zu lösen? Ich verwende den pdfLaTeX-Compiler.

**\documentclass[12pt,a4paper]{report}

\usepackage{amsmath, amsthm, amssymb}
\usepackage{array}
\usepackage{anysize}
\usepackage{faktor} 
\usepackage{placeins}
\usepackage{float}
\usepackage{enumerate}
\usepackage{fancyhdr}%for page number font
\usepackage{lmodern}%also for page number font
\usepackage[pdftex]{graphicx}
\usepackage{caption}
\usepackage{booktabs, calc, cleveref}
\usepackage{mathptmx}%Font: Times New Roman
\usepackage{setspace}
\usepackage[font={small},labelfont=bf]{caption}
\usepackage[titles]{tocloft}
\usepackage[notquote]{hanging}
\usepackage{sectsty}.
  \chapternumberfont{\nohang\centering\large\MakeUppercase} 
  \chaptertitlefont{\nohang\centering\large\MakeUppercase}
  \sectionfont{\fontsize{12}{15}\selectfont}
\usepackage{tikz}
\usepackage[final]{pdfpages}
\usepackage[footskip=1cm]{geometry}
\geometry{
   left=40mm,
   right=20mm,
   top=20mm,
   bottom=20mm,
 }
 %%%%%%%
\renewcommand{\cftchapleader}{\cftdotfill{\cftdotsep}}
\renewcommand\cftchappresnum{CHAPTER } 
   \cftsetindents{chapter}{0em}{6em}      

\pagestyle{fancy}
\lhead{}
\chead{}
\rhead{}
\lfoot{}
\cfoot{}
\rfoot{\thepage}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}
 %%%%
\fancypagestyle{plain}{
\fancyfoot{}
\fancyfoot[R]{\fontsize{10pt}{10pt}\selectfont\thepage}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}}
\pagestyle{plain}
%%%%
\renewcommand{\contentsname}{Table of Contents}
\renewcommand{\bibname}{REFERENCES}
%%%%%

\setstretch{2}
%%%%%%%%%%%

\begin{document}
\pagenumbering{arabic} 
\setcounter{page}{1}
%Chapter 1
\chapter{\MakeUppercase{INTRODUCTION}}

\section{Background of study} 
Associating a group with a graph and finding relationships between them is 
an area of research that has generated much interest. Research on this 
subject aims at investigating relationships between groups and graphs and at 
exploring applications of one to the other.
\newpage
The main contributions of this work
\end{document}**

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