Database tables order by records issue

In the WP Optimize Database page, if I order tables by records number, it order rows considering values in alphabetical (maybe ignoring thousands separator) and not numerical order.

So for example I see tables
wp_table1 866 records
wp_table2 546.895 records
wp_table3 493 records

Note that my site has italian language and plugin has 3.4.2 version.