The product listing was changed automatically by the Amazon system, and the reason for this was a fatal error

I have a serious problem!! I have listed a new product on Amazon, the product type is men's shoes, when I filled out the list, I entered the sizes for each shoe completely correctly, and I sent the shipments to the Amazon Center, but when the shipments arrived at the Amazon Center, it appeared to me that there was a discrepancy in the quantity, For example, when I entered size 9 when I prepared the list, I entered that it contains 20 pairs of shoes, but the list was changed automatically by Amazon and it dawned on me that size 9 should contain 15 pairs of shoes, and when the shipment arrived it contained 20 pairs of size 9 A contradiction appeared to me, and Amazon told me that size 9 should contain 15 pairs and not 20 pairs as I entered at the beginning!, And when I checked the list, I found that the sizes were changed roles automatically by Amazon, for example, size 9 changed the number of units that should be received and placed in size 10, for example size 9 entered that it should contain 20 pairs and size 10 entered that it contains It contains 15 pairs, but the list was changed automatically and it appeared to me that size 9 should contain 15 pairs and vice versa for size 10, When the shipments arrived, a discrepancy appeared and a problem occurred to me, which affected the progress of the process. I hope to get a good solution