I had hoped this mystery could be solved in the Random Image thread meaning I wouldn't need make a separate thread but this is bugging myself and the friend who's picture it is.
EDIT - I assume it is some camera blip but can someone explain how? I thought with digital photography, something like this would leave a ghosting effect and only happen if there was a slow shutter speed.

Is that a camera gremlin/bug? Or are there two sets of twins wearing and holding the same thing? My friend's stepfather took the picture on my friend's HTC One M8, I have cropped it but we assume it was taken in a normal mode and not panoramic as the picture looks like a normal picture in his gallery.
EDIT - I assume it is some camera blip but can someone explain how? I thought with digital photography, something like this would leave a ghosting effect and only happen if there was a slow shutter speed.