I bet its the SAs who entered stuff wrong. I had to get a price adjustment on 3 different occasions because they rang up more than what was advertised. You'd think I'd learn to check my receipt right after payment after the first time this happened, but I always forget to check the receipt until I get home, and realized they charged me more than they were suppose to, or they forgot to apply a discount, etc. So, I end up having to go back to the store the following day to get it adjusted.
However, I've noticed on two of the occasions, they actually returned my bag, and then made me repurchase it again with the correct price they should have given me. But, on the receipt it will show up as me returning the item because I didn't want it anymore, or that I didn't like the color. This concerns me because if anyone was looking through receipts, it would look very suspicious - like why would I return something I didn't want anymore, or was the wrong color, only to repurchase it again? I asked the SA one time and I was like, but I'm only getting a price adjustment because it was advertised at 30% off but it came up as full price when I paid, why did you put that I did not like the purchase on the return? And she said that she couldn't figure out how to do it, but her way of doing it was the same thing..."since didn't like my purchase because didn't like the price because it was wrong"