Configure display of categories on front page

Hello.

The URL of my Web site is: https://www.frogans-directory.com/

I am using Responsive directory theme.

Some time ago, I configured my site to display the list of categories on the front page.

Strangely, all sub-categories do not show. For instance, for the “Web sites” category, only 10 subcategories are shown, while there are 14.

I cannot find where to fix this.

Your help is welcome.

Jerome