'We only do deliveries over the phone': Cashier refuses to take delivery order in person, customer calls from the lobby

Rules usually exist for a reason. Generally, they come into being because someone did something and learned the hard way that the way they chose wasn't the way that it should be done, so it's decided that this way should never be attempted again by either them—or those surviving them—depending on how poorly their attempt went.

There is another type of rule, though, and these rules are generally made up by a bored busybody middle manager on a random Wednesday afternoon because they need something to add to their report for that week. These rules will be reluctantly complied with by their subordinates, with sufficient eye-rolling to boot. 

It's easy to imagine that you wouldn't expect someone ever to try and order a delivery in person, so it would make sense that perhaps the cashier would be a little bit confused about the arrangement, but if there was actually a rule against ordering a delivery in person, one can't help but wonder why this rule would even exist in the first place. Was the cashier trying to be difficult? Or was she actually adhering to a directive she was given by a higher-up?