right aligned reference labels with multibib - reference

Question

I am using multibib to include a reference list after each section. I added some code in order to make the reference labels look like [a.1],[a.2], ... where a is the section number.
It looks like the reference labels are left-aligned, which makes the text of the reference shift to the right, when having more than 9 entries.
I would like to have the labels right-aligned, such that the text after the label starts always at the same position. Is there an option in multibib I overlooked?
It is highly likely, that this is not exactly a mwe.
Thank you for your help
My texfile.tex is:
\documentclass[10pt,letterpaper]{article}
\usepackage[numbers,square,comma]{natbib}
\usepackage[resetlabels]{multibib}
\usepackage{totcount}
\newcites{sec}{Refs: Section 1}
\newcommand\newcite[3]{\citetext{\ref{#1}:\citealp#2{#3}}}
\renewcommand\bibsection{\subsection{\refname}}
\makeatletter
\newtotcounter{citenum}
\def\#mb#citenamelist{cite,citep,citet,citealp,citealt,citepalias,citetalias}
\makeatother
\pagestyle{plain}
\begin{document}
\section{Section 1}\label{sec:sec1}
\makeatletter
\renewcommand{\#biblabel}[1]{[\ref{sec:sec1}:\stepcounter{citenum}#1]}
\makeatother
\renewcommand{\newcite}[1]{\citetext{\ref{sec:sec1}:\citealpsec{#1}}}
\subsection{Subsection 1}
\noindent\newcite{knuth1986texbook1}
\noindent\newcite{knuth1986texbook2}
\noindent\newcite{knuth1986texbook3}
\noindent\newcite{knuth1986texbook4}
\noindent\newcite{knuth1986texbook5}
\noindent\newcite{knuth1986texbook6}
\noindent\newcite{knuth1986texbook7}
\noindent\newcite{knuth1986texbook8}
\noindent\newcite{knuth1986texbook9}
\noindent\newcite{knuth1986texbook10}
\bgroup
\let\section\subsection
\bibliographystylesec{unsrt}
\bibliographysec{bibfile}
\egroup
\end{document}
My bibfile.bib is:
#book{knuth1986texbook1,
title={The texbook},
author={Knuth, Donald Ervin and Bibby, Duane},
volume={1993},
year={1986},
publisher={Addison-Wesley Reading, MA, USA}
}
#book{knuth1986texbook2,
title={The texbook},
author={Knuth, Donald Ervin and Bibby, Duane},
volume={1993},
year={1986},
publisher={Addison-Wesley Reading, MA, USA}
}
#book{knuth1986texbook3,
title={The texbook},
author={Knuth, Donald Ervin and Bibby, Duane},
volume={1993},
year={1986},
publisher={Addison-Wesley Reading, MA, USA}
}
#book{knuth1986texbook4,
title={The texbook},
author={Knuth, Donald Ervin and Bibby, Duane},
volume={1993},
year={1986},
publisher={Addison-Wesley Reading, MA, USA}
}
#book{knuth1986texbook5,
title={The texbook},
author={Knuth, Donald Ervin and Bibby, Duane},
volume={1993},
year={1986},
publisher={Addison-Wesley Reading, MA, USA}
}
#book{knuth1986texbook6,
title={The texbook},
author={Knuth, Donald Ervin and Bibby, Duane},
volume={1993},
year={1986},
publisher={Addison-Wesley Reading, MA, USA}
}
#book{knuth1986texbook7,
title={The texbook},
author={Knuth, Donald Ervin and Bibby, Duane},
volume={1993},
year={1986},
publisher={Addison-Wesley Reading, MA, USA}
}
#book{knuth1986texbook8,
title={The texbook},
author={Knuth, Donald Ervin and Bibby, Duane},
volume={1993},
year={1986},
publisher={Addison-Wesley Reading, MA, USA}
}
#book{knuth1986texbook9,
title={The texbook},
author={Knuth, Donald Ervin and Bibby, Duane},
volume={1993},
year={1986},
publisher={Addison-Wesley Reading, MA, USA}
}
#book{knuth1986texbook10,
title={The texbook},
author={Knuth, Donald Ervin and Bibby, Duane},
volume={1993},
year={1986},
publisher={Addison-Wesley Reading, MA, USA}
}

Answer 1

The evolved solution to this problem was suggested by egreg on Feb 13 2013 Link to the stackexchange site
\usepackage{etoolbox}
\makeatletter
\patchcmd{\thebibliography}{%
\section*{\refname}\#mkboth{\MakeUppercase\refname}{\MakeUppercase\refname}%
}{}{}{}
\begingroup\catcode`#=12
\AtBeginDocument{
\patchcmd\thebibliography
{\advance\#tempcnta#1}
{\advance\#tempcnta#1\else\#tempcnta#1}
{}{}
}
\endgroup
\makeatother