Hi +Jack Chu
interesting... Haven't seen that happen.
Did you take photos with your mobile device?
Do you also have auto backup on?
Are you looking at the photos on a computer in the screenshot - in Highlights, All photos or where?
Does the same happen on your mobile, are you seeing the two pics there, too?
When you click open those two images what does it say in the top menu: Revert to original or Auto enhance?