When people get the shaken espressos upside down, i put the milk in the cup first and then the shaken components on top lol i think the people that do that just want it in an iced latte version but they don't want to pay for that because I think it's cheaper to get it as a shaken espresso. But one time I got an order for a brown sugar oat milk shaken espresso, upside down...and blended lmao i ignored the upside down modification because it makes zero sense if ur guna get it blended

the only thing i can think of is that from a customers perspective, when they order a caramel macchiato upside down, they receive a drink where the espresso and milk are mixed together instead of layered. by this logic, applying upside down to a shaken espresso could just mean the customer wants their drink stirred together and not layered, like how it would normally come if you were to pour the milk on top. easier to just say stirred, but im not sure thats an option on mobile, so that could be where the backwards thinking comes from

Milk first I guess?

I assume the upside down espresso means they want it made the old way (and in my opinion, the correct way), so ice is added after the shots are poured.