Annoying iBooks and App Store Feature

This is only a minor niggle but it annoys me whenever I stumble across it. In iTunes on the iPad media are queued for download when you buy them so you can buy three items from the same page without interruption. In iBooks and the App Store, you are dumped out of the store when the purchase is completed and you have to then tap back through the system to buy a second item on the same page.

As I said, only a minor niggle, but Apple are normally very good at eliminating interface and application inconsistencies so this one stands out like a sore thumb. There might even be a damn good reason for it but if there is I can't spot it.