I figured it out Kinda
So I had returned 1st iPad for light leakage.
When I tried to bring it back the replacement for leakage and a missplaced homebutton the Genius bar guy entered the wrong serial number from the ticket.
Alex Pang purchased my old iPad with the light leakage .........
I found out becuse my repair request was canceld.
Apple renewed the request with the right serial number.
Now my question is does Apple repack and resell returned Ipads for light leakage ?