Why?

Currently they release new prices on Monday, on a weekly basis, and they’re changed by hand throughout the day. The non-digital signage with last week’s prices can still be up while you’re shopping but at the register items will ring in with the new price.

If that happens they will honor the price on the shelf as long as the UPCs match (people move those price signs all the time, on accident and on purpose).

I understand the corporate bad evil company stance but in this instance people are reaching conclusions based entirely on wild speculation.