The problem with Dick's is that their supply system is FUBAR. I worked there for three years. The one thing that surprises most people is that the folks at the store level have ZERO input into what comes to the store. Corporate send you whatever they think you need- and they're often very, very wrong.
There were several times when we'd not get in the first bit of buckshot or slugs until two weeks after gun season opened up. There times when we'd get in like one case of, say 9mm every two weeks. Other times, we'd randomly get in ten cases out of nowhere.
In short, the system was worthless for dealing with normal demand. It doesn't surprise me a bit that it's completely off the rocker with the current situation.
The worst part of it is that I, the peon with no say in the process whatsoever, was the one who got bitched out by folks.