When you encounter supplies for which Walmart limits quantities 10 1-2/family/visit, simply go to the self-scan checkout station, where there is no cashier to limit or monitor your purchase.
The scanners are not yet programmed to deny your purchase.
Today, I was able to buy 6 bottles of hydrogen peroxide this way, whereas had I gone to the traditional checkout lane, I would have been limited to 1.
Eventually, they will figure this out, but right now if your opportunity.