The events are importing from facebook with weird dates. The start date is correct but it is showing

The events are importing from facebook with weird dates. The start date is correct but it is showing an end date of 1-1-1970 (unix epoch time) on the edit event page. However, on the all events admin page, it shows dates like this: Saturday, July 6, 2013 - Monday, July 1, 2013. This is causing the events to not display at all on the front-end. Any ideas?

dev site:
http://therustyrudder.net.bft.bitfliptech.com/