Vfill after a table does not work

Question

I have a table at the top and would like to place the title at the page mid - or place it with vspace. But it doesn't work. Here is my code and my problem is on line 17 (the vfill do nothing).

\documentclass[a4paper, oneside]{memoir}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}

\begin{document}

\begin{table}[t]
   \begin{tabularx}{\textwidth}{|XX|} \hline
    \textbf{Received:}           & \textbf{Approved:}  \\
                              & \textbf{Date:}      \\
                              & \textbf{Signature:} \\
\textbf{(for the instructor)} &
    \\ \hline
  \end{tabularx}
\end{table}

\vfill %Why does this do nothing?

\begin{center}
\begin{minipage}{.6\textwidth}
\begin{center}
\Large{{\itshape Course}\\}
{\fontsize{40}{48} \textsc{\textbf{Title}}}\\
\rule{7.5cm}{0.1cm}\\
\vspace{0.25cm}
\begin{large}
\textsc{%
University\\
Institution\\
\today\\
}%
\vspace{0.25cm}
\rule{3.75cm}{0.1cm}
\end{large}
\end{center}
\end{minipage}
\end{center}

\vfill

Author \hfill E-mail

\end{document}

Kind regards and thank you very much in advance.

Answer 1

table creates a float. So in the main page, there is nothing at all before the \vfill so there is no need, LaTeX thinks, to fill it. (There is nothing to fill.) However, you presumably don't want a float here: you don't want the tabular to move. So don't put it in a table:

\documentclass[a4paper, oneside]{memoir}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}

\begin{document}

\noindent\begin{tabularx}{\textwidth}{|XX|} \hline
\textbf{Received:}           & \textbf{Approved:}  \\
                          & \textbf{Date:}      \\
                          & \textbf{Signature:} \\
\textbf{(for the instructor)} &
\\ \hline
\end{tabularx}

\vfill %Why does this do nothing?


\begin{center}
\begin{minipage}{.6\textwidth}
\centering
{\Large\itshape Course\\}
{\fontsize{40}{48} \textsc{\textbf{Title}}}\\
\rule{\linewidth}{0.1cm}\\
\vspace{0.25cm}
\large
\textsc{%
University\\
Institution\\
\today\\
}%
\vspace{0.25cm}
\rule{3.75cm}{0.1cm}
\end{minipage}
\end{center}

\vfill

Author \hfill E-mail

\end{document}