Happy but not satisfied

I have been impressed with delivery times, just not so happy when you order food such as a meal from KFC, the streetwise 3 where you can select 2 large and one small piece and you end up with 1 large and 2 small which is nonsense as they say according to availability they should not accept the order then because a streetwise 3 is 2 large and 1 small - this is more so from the restaurant