I find it hard to believe that it's intentional that you be able to move an app in multitasking to the left of the home screen considering there isn't a method or way to move it intentionally - this has to be a bug.Wouldn't surprise me if this was intended. After all, Print Center isn't an app you can open up from the home screen, but rather it's more of a system app then you can only bring up through a specific menu.
iOSBry