How can I fix column 4 so that it's aligned the same as the other columns? Note that if the columns only consisted of the numerals (row 2), that column 4 would still be misaligned.
\documentclass[twoside,12pt]{memoir}
\newcommand{\instruction}[1]{\begin{scriptsize} \textsf{#1} \end{scriptsize}}
\begin{document}
\begin{tabular}{>{\centering\arraybackslash}m{.2\textwidth} | >{\centering\arraybackslash}m{.2\textwidth} | >{\centering\arraybackslash}m{.2\textwidth} | >{\centering\arraybackslash}m{.2\textwidth}}
one & two & three & four \\
1111 & 2222 & 3333 & 4444
\end{tabular}
\end{document}
4444
!