One last random Amazon link, and I admit the video is boring, but if you’re interested in Fulfillment by Amazon, they have an instructional video on how your shipment to the fulfillment center is received and processed, that includes some good tips on making sure you don’t do something to cause delays.
Such errors reaching the fulfillment center can add weeks to hitting available inventory in some cases, and if you run out of stock during that phase, you can also be punished by Amazon’s algorithms. So you want to make sure you send things to Amazon the proper way.