Events Not Showing on Main Events Page Anymore

When I add or update events they are not showing up anymore on the main events page. I have 3 events posted, but only one is showing on the events page. The health and wellness seminar in altamonte springs is no longer showing ever since I updated it with new dates. The latest health and wellness seminar at yellow dog eats is posted but not showing on the main events page. You can only see the events through the breadcrumb navigation. How do I get the events to show up on the main events page again?

This is the link in question: