InApp Purchase problem

The new in App Purchase extension doesn´t have the " * Mark the purchase as completed for the user to be charged by the store." And I Think it is causing problems im my game. After the first item that I buy the second one doesn´t let me update its variable.
Example. I buy 50 coins and the user will have 50 coins, and if I buy more 100, other item, it will keep with 50 coin. It is so crazy.

It is hard, you want to make things work perfect, but you miss support sometimes.

Any news on this post?