I'm trying to figure out Amazon shipping... Today I sold two similar products within a few minutes of each other. (Same size, weight, etc.) Standard shipping was selected by both buyers for each item. "Item A" shows a "ship by" date of tomorrow. All good. But, "item B" shows a "ship by" date 8 days from now. Why?? Both customers selected the same "Standard" shipping. I've checked the handling time for both items and they are the same. Can someone smarter than me tell me what I'm missing?