Table of Contents and Bibliography Have Wrong Headers

Question

I use \usepackage{fancyhdr} for headers and I believe it is causing some problems with "chapters" that aren't really chapters, like the table of contents and bibliography. On the header of the second page of ToC there is written "Chapter 0" (the first page is clear), and it continues on alternating pages between "Chapter 0" and "Contents".

Almost the same thing happens in bibliography, but in this case only the word "Chapter" is written. It also alternates between the words "Chapter" and "Bibliography"

How can I make it not display "Chapter 0" and "Chapter" on only these two sections of the document? I don't mind if there is nothing written in their place or where the words "Contents" and "Bibliography" are, but I would like to keep the page number as it is and the line in the top of the page.

\documentclass[12pt, twoside]{report}

% package to activate greek language - the sequence languages appear below is IMPORTANT!!!
\usepackage[greek,english]{babel}
\usepackage{varioref}
%\usepackage{hyperref}

% package to handle graphics
\usepackage{graphicx}
% package to handle multiple figures in a minipage
\usepackage{subfigure}
% package to extend math capabilikai ties
\usepackage{amsmath,amssymb,isotope}
\usepackage[version=3]{mhchem}
%package to activate XeTeX font manager
\usepackage{fontspec}

% DOCUMENT LAYOUT
\usepackage{geometry} 
\geometry{a4paper, textwidth=6in, textheight=8.5in, marginparsep=7pt, marginparwidth=.6in}
%\geometry{a4paper}
\setlength\parindent{8mm}
\setlength\parskip{5mm}

% FONTS
\usepackage{xunicode}
\usepackage{xltxtra}
\usepackage{xcolor}
\defaultfontfeatures{Mapping=tex-text} % converts LaTeX specials (``quotes'' --- dashes etc.) to unicode
%\setromanfont [Ligatures={Common}, BoldFont={GFS Artemisia Bold}, ItalicFont={Gentium Italic}]{Gentium}
%\setmonofont[Scale=0.8]{Monaco} 
\setmainfont{Times New Roman}

% ---- CUSTOM AMPERSAND
\newcommand{\amper}{{\fontspec[Scale=.95]{Times New Roman}\selectfont\itshape\&}}

% package to handle line spacing
\usepackage{setspace}

% HEADINGS
\usepackage{sectsty} 
\usepackage[normalem]{ulem} 
\sectionfont{\rmfamily\mdseries\upshape\Large}
\subsectionfont{\rmfamily\bfseries\upshape\normalsize} 
\subsubsectionfont{\rmfamily\mdseries\upshape\normalsize} 

\usepackage{fancyhdr}
\pagestyle{fancy}
\renewcommand{\chaptermark}[1]{\markboth{#1}{}}
\fancyhf{}
\fancyhead[LO]{\chaptername~\thechapter}
\fancyhead[RE]{\leftmark}
\fancyhead[RO,LE]{\thepage}



\usepackage{afterpage}
\newcommand\blankpage{
    \null
    \thispagestyle{empty}
    \addtocounter{page}{-1}
    \newpage
    }

% PDF SETUP
% ---- FILL IN HERE THE DOC TITLE AND AUTHOR
\usepackage[driverfallback=dvipdfmx, bookmarks, colorlinks, breaklinks, pdftitle={name - title},pdfauthor={name}]{hyperref}  
\hypersetup{linkcolor=blue,citecolor=blue,filecolor=black,urlcolor=blue} 

% package for fancy style headers and footers
\usepackage{fancybox}


% redefine bullet symbols and section style
\renewcommand\thesection{\arabic{section}}
\renewcommand{\labelitemi}{$\blacktriangleright$}
\renewcommand{\labelitemii}{$\bullet$}

% change captions especially for greek language - if the document is in ENGLISH, they should vanish
\addto\captionsenglish{%
  \renewcommand\prefacename{Πρόλογος}%
  \renewcommand\refname{Αναφορές}%
  \renewcommand\abstractname{Περίληψη}%
  \renewcommand\bibname{Βιβλιογραφία}%
  \renewcommand\chaptername{Κεφάλαιο}%
  \renewcommand\appendixname{Παράρτημα}%
  \renewcommand\contentsname{Περιεχόμενα}%
  \renewcommand\listfigurename{Κατάλογος Σχημάτων}%
  \renewcommand\listtablename{Κατάλογος Πινάκων}%
  \renewcommand\indexname{Ευρετήριο}%
  \renewcommand\figurename{Σχήμα}%
  \renewcommand\tablename{Πίνακας}%
  \renewcommand\partname{Μέρος}%
  \renewcommand\enclname{Συνημμένα}%
  \renewcommand\ccname{Κοινοποίηση}%
  \renewcommand\headtoname{Προς}%
  \renewcommand\pagename{Σελίδα}%
  \renewcommand\seename{βλέπε}%
  \renewcommand\alsoname{βλέπε επίσης}%
  \renewcommand\proofname{Απόδειξη}%
  \renewcommand\glossaryname{Γλωσσάρι}%
  }

\usepackage{xgreek} 

\renewcommand{\thesection}{\thechapter.\arabic{section}}

%%%%%%%%% END OF PREAMBLE %%%%%%%%%%%%

\begin{document}

\setlanguage{greek} %% this is to activate greek hyphenation

% make title out of \author, \title, \date  specified in the preamble
\input{thesis_01_titlepage}
% create a blank page immediately after the cover page
\afterpage{\blankpage}

% This is only meant to include the NuSTRAP group logo in a separate page.
% Remove it if not interested.
\include{thesis_02_abstract}
\afterpage{\blankpage}
\include{thesis_03_dedication}
\afterpage{\blankpage}

% Create table of contents - not mandatory
{
  \hypersetup{linkcolor=black}
  \clearpage
  \tableofcontents
}
\afterpage{\blankpage}

% Create a list of figures - not mandatory
%\listoffigures


% include files with content. Changes the names according to your taste.
\chapter{Πρόλογος}
\input{thesis_04_intro}

\chapter{Τίτλος}
\input{thesis_05_theory}

\chapter{Κι άλλος τίτλος}
\input{thesis_06_title}

\chapter{Ένας ακόμη τίτλος}
\input{thesis_07_anothertitle}



\bibliographystyle{abbrv} % bibliography style is abbrv:  eg. [1]

\bibliography{thesis_references} % this is the .bib file that holds the bibliography records 

\appendix
\renewcommand*{\thechapter}{\Roman{chapter}}
\chapter{Παράρτημα}
\input{thesis_appx01_tests}


\end{document}

EDIT: I solved the problem with the appendices using \markboth{Name of appendix}{Appendix III} right under \chapter{Name of appendix}. There were only 3 appendices, so it wasn't a fuss.

Answer 1

If there are no other unnumbered chapters than the TOC and the bibliography, you could use:

\usepackage{fancyhdr}
\pagestyle{fancy}
\renewcommand{\chaptermark}[1]{\markboth{#1}{\chaptername~\thechapter}}
\renewcommand{\sectionmark}[1]{}
\fancyhf{}
\fancyhead[LO]{\rightmark}
\fancyhead[RE]{\leftmark}
\fancyhead[RO,LE]{\thepage}

Example (without the not related stuff):

\documentclass[12pt, twoside]{report}
\usepackage{blindtext}% only for dummy text

\usepackage{fancyhdr}
\pagestyle{fancy}
\renewcommand{\chaptermark}[1]{\markboth{#1}{\chaptername~\thechapter}}
\renewcommand{\sectionmark}[1]{}
\fancyhf{}
\fancyhead[LO]{\rightmark}
\fancyhead[RE]{\leftmark}
\fancyhead[RO,LE]{\thepage}

\bibliographystyle{abbrv}

\begin{document}
\tableofcontents

\Blinddocument% dummy chapter

% dummy multipage bibliography
\bibliography{ascexmpl.bib}
\nocite{*}

% dummy chapters to get a multipage TOC
\Blinddocument\Blinddocument
\Blinddocument\Blinddocument
\Blinddocument\Blinddocument
\Blinddocument\Blinddocument
\end{document}

Result: