Giant Eagle review: a price that was displayed & changed.

About 12pm on 03/31/2019. I & my daughter were shopping. We checked out & as I always do check my reciept, I noticed that my bill was alittle more than expected. I checked it throughly them came across a mistake that the cashier had made. (I assumed) I was charged 3.99 each for two box of cheez its. The regular ones & some of the other flavors were 3.99. Then there was sign in front of the 4 Italian cheeses & the Extra Toasty brand only. With a red sticker saying 1.99 /Save $2 & had these two brands on the sticker. I went to customer service after reviewing my reciept & having my daughter recheck the sign. The customer service clerk walked over & check the prices & then came back with the sale stickers & said that the price tag information didnt match the cheez its & they were ringing up 3.99. We were confused because we had already double checked ourselves to keep down confusion. We went back to check & everything was gone. The Sale sticker & the description name was gone also that said 4 Italian Cheese & Extra Toasty. I asked the customer rep. what happened to the stickers she said she didnt know she didnt see them. I look down at the counter & the stickers are there right in front of her & she was throwing the descriptions away in trash. I recieved refund. But I just didnt understand how there was a Sale Price that I didnt recieve. & to prove the point of the Sale the Customer Service Rep. Removed it. Should I have recieved the Sale Price that was posted? Or are you allowed to just change prices within seconds of a Customer Questions? That was a great sale price that I didnt recieve.

Manager Name was Elaine & Customer Rep. Kim
My name is Yolanda Edmonds [protected]. Thank You Just needed an explanation. Confused.