Nintendo released million sellers Wii/DS list

[Bodhesatva]

Just for future reference, Slash, these figures you're posting are shipped totals (meaning, how many copies Nintendo has sold to retailers such as Toys R Us or Best Buy). The totals Ioi is reporting are figures to consumers.

This means that the numbers shouldn't be equal; more specifically, there should be more total sold to retailer than there are sold to consumers, as a small portion of the games will still be on retailer shelves. 

This explains why  virtually all  of the games you've highlighted here are either significantly or ever-so-slightly undertracked, with very few being overtracked. Not that Ioi is perfect, mind you, but it's probably even closer than you've calculated here.