I will continue to wait, still not understand why some of us already got the motors while the others have no invoice (I think that this is because we are international buyers).

By the way, they are still commit to confirmation within 1-2 days.
This is from the sale website:
"Due to an incredible response to our sale, please note the following:
1.THANKS for the order!
2.We are processing as fast as we can, and will send you an order confirmation within 1-2 business days of receipt.
3.We anticipate shipping items within 1-3 days of receipt.
4.Tell your friends - these deals won't last long!! "