Ghost Cars Army Illusion

Let’s continue with today’s optical illusion. It is Google Earth related (not Google iPod). Anonymous submitter sent me this strange Google Earth snapshot. I’m somehow picky with all those Google Earth submissions I receive through my mailbox. Am not sure why exactly. However, this one I found rather interesting. Anonymous said: “This is more of a glitch than illusion, but here is a cars “ghost army” from google earth. The illusion is near Sydney, Australia and Balmain, New South Wales at 33°51′ 51.63″S, 151°11’11.69″E” Not only is that the cars appear ghostly, what interests me is what are they doing there at all? I understand how Google Earth satellite images often have mistakes in layers because of different times photos were shot, but how did this occur? You tell me!