Some things shouldn’t be mixed
We would probably all agree that plates of the same size should all be stored together and that we shouldn’t put other styles or sizes in the stacks that don’t match. It’s an unspoken rule, of course. We do the same with cutlery, glasses, and kitchen utensils.
It doesn’t mean that there can’t be different models or sizes; they just shouldn’t be mixed together. This person probably unknowingly mixed all the dishes together regardless of shape and size. Some fans of Marie Kondo, the world’s most well-known organizing consultant, must be freaking out right now.