\documentclass[a4paper]{article}

\usepackage[utf8x]{inputenc}    
\usepackage[T1]{fontenc}

\usepackage[bloc,completemulti]{automultiplechoice}    
\begin{document}

\def\AMCanswer#1#2{#1 #2 $\bullet$ }

\exemplaire{5}{    

\noindent{\bf QCM  \hfill TEST}

\vspace*{.5cm}
\begin{minipage}{.4\linewidth}
\centering\large\bf Test\\ horiz-ordered\end{minipage}
\champnom{\fbox{    
                \begin{minipage}{.5\linewidth}
                  Name:

                  \vspace*{.5cm}\namefielddots   
                  \vspace*{1mm}
                \end{minipage}
         }}

\begin{center}\em
  This test is related to bug \#866: with choiceshoriz and ordered
  mode, scorings lead to an individual solution document not matching
  the layout of the subject document...
\end{center}
\vspace{1ex}

%%% fin de l'en-tête

\begin{question}{horizo}
  Which is the largest?
  \begin{choiceshoriz}[o]
    \wrongchoice{-100}\scoring{-1}
    \wrongchoice{-50}\scoring{-2}
    \wrongchoice{-25}\scoring{-2}
    \wrongchoice{9}\scoring{-1}
    \wrongchoice{13}\scoring{0}
    \wrongchoice{28}\scoring{0}
    \correctchoice{54}\scoring{2}
  \end{choiceshoriz}
\end{question}

\begin{question}{horiz}
  Which is the largest?
  \begin{choiceshoriz}
    \wrongchoice{-100}\scoring{-1}
    \wrongchoice{-50}\scoring{-2}
    \wrongchoice{-25}\scoring{-2}
    \wrongchoice{9}\scoring{-1}
    \wrongchoice{13}\scoring{0}
    \wrongchoice{28}\scoring{0}
    \correctchoice{54}\scoring{2}
  \end{choiceshoriz}
\end{question}

\begin{question}{customo}
  Which is the largest?
  \begin{choicescustom}[o]
    \wrongchoice{-100}\scoring{-1}
    \wrongchoice{-50}\scoring{-2}
    \wrongchoice{-25}\scoring{-2}
    \wrongchoice{9}\scoring{-1}
    \wrongchoice{13}\scoring{0}
    \wrongchoice{28}\scoring{0}
    \correctchoice{54}\scoring{2}
  \end{choicescustom}
\end{question}

\begin{question}{custom}
  Which is the largest?
  \begin{choicescustom}
    \wrongchoice{-100}\scoring{-1}
    \wrongchoice{-50}\scoring{-2}
    \wrongchoice{-25}\scoring{-2}
    \wrongchoice{9}\scoring{-1}
    \wrongchoice{13}\scoring{0}
    \wrongchoice{28}\scoring{0}
    \correctchoice{54}\scoring{2}
  \end{choicescustom}
\end{question}

}   

\end{document}
