Take a closer look, the grain might have been crushed. It isn't going to look like flour, just broken grains. If they messed up, get out your rolling pin & crush the grain. All you need to do is break the grain in half and crack the hulls.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk