My sister is using iCloud calendars and has friends birthdays in her contacts so they show in the calendar. I have mine set up the same way and don't have this issue. Now when she goes into her calendar app, she has like 30+ instances of the birthdays calendar and is unable to edit or delete the numerous extra ones. I told her to turn the iCloud calendar off then on again to see if that helps but no word if it has yet. Anyone else experiencing this?