Problem with Calendar: somehow I have 9 (!!) copies of each of my iCloud calendars on my desktop; one any other device, or when I log into iCloud, only 1 copy appears. I've tried deleting them, but ended up deleting the one in iCloud, but I was able to restore them. Turning off iCloud makes all the iCloud calendars disappear, but once iCloud is turned back on, even with a restart, all 9 re-appear. I've also tried (repeatedly) refreshing the calendars. Any thoughts?
Calendar, OS X El Capitan (10.11.2)