answer:This is the general standard procedure for online digital media sales. It makes it easier for both parties if they send one bill rather than three, or, in some cases, hundreds. You wouldn’t want fifty 99¢ purchases, all billed seperately. It’s the same as going to a store. When you buy groceriers, you don’t get a separate reciept for your milk and another for your eggs. I think the two days is because A) It may take that long to process. B) iTunes may be giving you time to make a few more purchases for writing up the reciept. This would be, simply, to cut down on the ammount of reciepts.