As the guys mentioned: Adjustments.
Please do not think this is trolling or anything like it, but I think VGC does not know exactly where Sony sold (shipped) those PS3s to explain the gap. We do get pretty good data for NA, Japan and sometimes for UK, so it seems like they just put it in EMEAA. I doubt VGC knows where exactly. But that should not discredit the great work VGC did with the tracking in the past years.
There once was a great sig here, but it got killed.
A moment of silence would be appreciated.