I have 7 events on my calendar which repeat every 2 weeks, they were all added at the same time over a year ago. I have both ipad and iphone and the calendar syncs ok. I sometimes add notes or locations to individual dates and save 'for this event only'. I have just put in different locations on a number of them and then went through them to check I hadn't missed any. One of them wasn't updated so I changed it, I then noticed it had reverted back to the original entry, I tried changing it on my phone and the same thing happened. I have compared it to the other events and they are all set up the same way. I tried deleting the event both ways (for this event only and all future events) it disappears for a few seconds then comes back. I've changed the settings to sync all events on both phone and ipad, I've tried closing the calendar by sliding it up, I've tried rebooting the ipad, none of these have worked and I have run out of ideas. Any clues?