Wow - I was way off, huh?
This is a standard WP feature. It has to do with categories, not pages. What she has done is categorized those posts under "Weight Loss News." When people click on the category, they see all posts filed under it.
This feature is built into Fresh Journal. If you visit this webpage on the demo site, you can see it: http://simplyfreshthemes.com/demo/freshjournal/category/category-2/ I named the category "Category 2" just like she named hers "Weight Loss News." The category pages are controlled by the "archive.php" file.
Fresh Journal only shows pages in the top nav. The bottom is where you can choose to list all categories. If you want to add categories to your top nav, you will need to replace the page code (<?php $excludepages = get_option('freshjrl_page_exclude'); wp_list_pages('title_li=&depth=4&use_desc_for_title=0&exclude=' . $excludepages); ?>) with category code ( <?php wp_list_categories(); ?> ). Please note, the stylesheet is not set up to style sub-cat dropdowns.
Let me know if this addresses your issue.