I read that somewhere .. my case number is matching with that logic. As per the logic, yous case indicates that you filed the case on 284th day of year 2012 .. not sure how the priority date became 05/10/13 ! Me too confused !
@KeepingSecret, your PERM application would have been started on the 284th day of 2012, but was actually submitted on 5/10. A number is always the date when the application is started, but the application processing happens based on PD.