I see a lot of Photos repeating in the Slideshow
About this aspect:
Are you using a Mac computer?
If so, This is a Mac issue that we are aware of, but can't control unfortunately.
As you probably know, Mac systems can often have 'hidden' files when you make transfers onto Memory Cards. These interfere with the frame and create duplicates.
If you have access to a PC please insert the SD card into the PC and view the files.
You should be able to select an option to view ALL files, including hidden ones and duplicates. When you see them listed, just select and delete them, so all you have left is the photo files on the Card that you want to view.
That should work on the frame.