Why are certain games like the Last of us so under tracked?

[Ryng]

Not only.

Zelda S.S have sold confirmed 3,420,000 first month, VGChartz said 2,800,000... and as for now, the game is at 3,800,000... it is probabily at 5/6 million!

 

OT: I want say 10,500,000, but is Strange that Sony have not annunced +10M sold... so, i'm go with +9,500,000.