It looks to me like somebody accidently broke off the tab on the one on the right and instead of jumpering the two screws together on the left side of the outlet they thought it would be okie dokie to jumper it on the right.
The outlet on the left is the good one.
The question is whether or not the manufacturers employee who built this actually has an understanding of the way it is supposed to work. Do they even know what polarity is? A lot of places (and not just in the third world) do not require there assemby line workers to be knowledgable about how the product actually works.
I think it was an oopsie and they didn't understand what the consequences were of swapping the sides the leads were on.
