Our events, after being created, at some pointed are being copied by the system. This has been a continuous process. When you go to CiviCRM-Events manage is where the copies are occurring under "Show Current and Upcoming Events. We have past events occurring ONLY because no end date was ever inputted when the event was created. So the event copies go back quite a few years.
We have a total of 11 "actual" events, yet CivCRM now shows 3,460 events. When this first was happening we have 200 events that appeared.
We have been manually trying to delete but the copies reoccur again. I had the events total down to 900 only a month ago! I could not keep up with deletions. The deletion itself of an event is a long process; it is not like you can click a check box and delete selected. I have requested support from joomla, CivCRM, Civi Stack Exchange. The last response I received from a tech was that it was possibly due to Jevents.
I just happened to search through CivCRM issues and found someone having the exact same problem - FINALLY:
https://issues.civicrm.org/jira/browse/CRM-10763.
This issue needs to be resolved it is out of control! I have sent a sample of the CivCRM event page.
We use CiviCrm 4.6.15, Joomla 3.6.3, Jevents 3.4.23.
PLEASE HELP US!