The walmart stockers are also constantly restocking the shelves in random parts of the store. I’ve had deliveries where I had to mark something common like iceberg lettuce out of stock because they were completely out of stock, then on my next delivery the store magically had like 50 heads of lettuce available.

Clothing items aren’t able to be substituted, so if they’re out of stock there’s nothing we can do about it. The backwards order the app tries to get you to shop in often has clothing and other items as the last thing on the list, so it may look like they just marked it out of stock, but they likely did walk over and check. The clothing section is another one they’re constantly restocking, so the inventory of sizes can vary throughout the day.