What version of our plugin do you use? Actually, the events expire only by time and not day. Please make sure that your Joomla server is configured to the same timzone of your location.
Kindly email us your Joomla admin access details to This email address is being protected from spambots. You need JavaScript enabled to view it.. So, we can check what is going wrong.
Alternatively, you can enable to show "Past Events" .