Past Events List not showing all events

I’ve set up the following shortcode on this page. [events_list scope=”past”]

I would like to show all past events we’ve had but it’s only showing past events until August of 2017. We’ve had an event almost every month since then but none will show up. I’ve looked at the events and I don’t see anything that is difference from the events that show to the ones that aren’t.

The page I need help with: [log in to see the link]