\label{\detokenize{tabular:table-having-both-widths-and-problematic-cell}}

\begin{savenotes}\sphinxattablestart
\centering
\begin{tabular}[t]{|\X{30}{100}|\X{70}{100}|}
\hline
\sphinxstyletheadfamily 
header1
&\sphinxstyletheadfamily 
header2
\\
\hline\begin{itemize}
\item {} 
item1

\item {} 
item2

\end{itemize}
&
cell1\sphinxhyphen{}2
\\
\hline
cell2\sphinxhyphen{}1
&
cell2\sphinxhyphen{}2
\\
\hline
cell3\sphinxhyphen{}1
&
cell3\sphinxhyphen{}2
\\
\hline
\end{tabular}
\par
\sphinxattableend\end{savenotes}
