Wrong enumation of tables (only odd numbers)

Question

Example:

\documentclass[]{article}
\usepackage{hhline,booktabs}
\usepackage{tabularx}
\usepackage{ltablex}
\begin{document}
\begin{table}
\caption{My Table 1}
\label{tab:mytable1}
\begin{tabularx}{\textwidth}{lXX} \toprule
a & b & c \ \midrule
1 & 2 & 3\ \hline
\end{tabularx}
\end{table}
\begin{table}
\caption{My Table 2}
\label{tab:mytable2}
\begin{tabularx}{\textwidth}{lXX} \toprule
d & e & f \ \midrule
4 & 5 & 6\ \hline
\end{tabularx}
\end{table}
\end{document}

This code result in this:

As you can see, the automatic enumeration does not count correctly here. I guess, it counts both \table and \tabularx.

In this very similar question it is stated that the reason is the ltablex package which should be removed. Well, I need it because some of my tables are really long and need to be spread over several pages.

Is there a way to solve this problem? I require:

• long tables
• flexible column widths (the X feature)
• captions and labels

Thanks in advance.