Plugin: WP Events Calendar widget – Wrong event info

I’m managing a website using the WP Events Calendar plugin as a calendar and as a widget displaying the next 4 events. This is the site I’m referring to:

http://thebigread.org/

The first event displayed in the widget on the right hand side on February 7th is wrong – it’s not on the calendar (http://thebigread.org/events) and the actual event it refers to occurs on March 7th at a different time. The reference to the nonexistent Feb. 7th event has an odd end date I noticed too, 11/30/1999. I’ve tried deactivating and reactivating the widget but so far I can’t get this event off of the widget’s list.

We’re using Third Style 1.1.1 for our theme.

Thanks for the help!