Delete Duplicate My Cloud Mirror Gen 2(2-Bay )

Issue 1- Synching of devices(iphone, desktop etc) cause duplicate images on WD Cloud. For example my wife and myself having similar photo on the mobile as we shared on the whatup or our friend sent picture to use that we save on mobile.
Question - Do we have any app or option to delete all duplicate in one shot from My Cloud. Is there any way that WD Cloud will automatically identify duplicate and keep only one copy of the file. I know it would be difficult if the image file name is different but for the same file name it should take care of the duplicate.
Issue 2 - If we delete any image/Video file from the mobile or any device, will it delete from the My Cloud dirve as well? Is there any way to achieve this?