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I hate to break it to you, but September delivery and Shipping in September mean basically the same thing. "Delivery" is per definition the act of transporting letters or goods to a predefined point/person - shipment is the act or an instance of shipping goods. It is NOT the same as you getting your order in September.
I see. So if i just had a letter delivered to me, that means someone just dropped it in the mail, and i should be expecting delivery soo.. wait. Where do you get this ridiculous stuff? Is this a German thing? Sauce pl0x.