Whether this is a new policy or not (they claimed its been like this), I've never seen it. In fact the following experience has taken place before and this didn't happen.
While shopping, I came across a mis-priced item. It was meant to be under that label as there were 6 of them on that peg and the label named that item with that price. We got to the register and they said they'd honor the incorrect price only once (one item).
Despite all 6 being labeled that price; incorrect or not. Apparently WalMart, so concerned about its customers, won't invest in upping its game and properly arranging its stores, but it will instead screw over those very same customers.
Product or Service Mentioned: Walmart Customer Care.
Reason of review: Pricing issue.