Wow! Great in-depth discussion there! The reason 86k in the first month is important is because titles tend to sell a big lump up front. They certainly sell more in the first month than other months as there's a rush for ownership from those who have been excitedly following the game's development. 86k per month would imply lower sales every other month, which means very low sales for the title. In NA.Nobody knows.
Any proof?
So what?