This week I was sick and went to whole foods like 3 times over 5 days to get soup. The soup shelf became more and more empty over time and didn't seem to be getting restocked which struck me as odd.
You just explained that your behavior itself was odd (you are sick.) Have you considered that you've not normally done this and so you've never noticed that this is always what happens? My local grocery store has premade foods, like soups, and they get made in bursts and slowly run out over several days. So what you observed could be the norm.