Reasonable on 04 September 2008
The question is not is it undertracked as this site is only showing an estimate of retail sales. The question is how much has it also sold on PSN? That added to a decent estimate of retail sales will give you the number you seem to be looking for.
It's pretty obvious Warhawk must have sold more in total due to PSN, but I believe PSN sales are pretty hard to track at the moment.
Try to be reasonable... its easier than you think...
