That's inconvenient, but I've known for over a week that it now needs to be scheduled a week in advance, and I had all the information to determine approximately what I'd need in one week's time (how much we have now and how much we eat), so, if you can get a spot one week out, it's only a minor failure.
If you try to order grocery pickup/delivery the day you run out of food, yes, it's a big problem, but the information that you have to plan at least a week ahead is widespread enough that it's an inconvenience, not a disaster.