sphax3d

More precisely, the plugin should support the orderby and the order properties and it should allow to choose the orderby value ??

Awesome ! I would like to report that problem right now.
Thank you very much guys ??

You should replace the line 307 too :
$return .= '<h2 class="wsp-posts-title">'.__('Posts by category', 'wp_sitemap_page').'</h2>';

More information :
– https://www.php.net/manual/en/function.number-format.php
– https://stackoverflow.com/questions/14782545/php-mysql-division-returns-a-float-with-comma-how-to-return-result-with-a-po