Why are duplicates of the same event suddenly appearing on the same page?

Hello,
When I click to reveal the details of an event it takes me to a page that repeats the same event over and over again. Please see these two examples:
http://blackmothersunited.org/event-details/2015/11/support-group-meeting-3/
http://blackmothersunited.org/event-details/2015/12/support-group-meetings-6-0/

This has never occurred before so it's unclear what might have changed. Can you please assist in rectifying this issue.

Thanks so much!
Sincerely,
Kimberly