I was just in Safeway (a former Albertson's if it matters) yesterday. I bought a couple of items but bypassed the scanning of a shopper card/entering a phone number. The self-checkout knocked the prices down to the reward card level anyway. I can only assume they've linked my payment method to a reward card in the past. That or they are no longer requiring rewards cards to get the discounts.

Since the register already priced my bill higher at the time I swiped my card and then dropped the price, I have to assume it's the former.