Kmart review: Being overcharged

Last few times I have been in the store, I have been overcharged for my items that I purchased. The last time the scanner was not putting in the correct price of the sale item. I went out to my car thinking that the purchased price was too much. After I looked over my receipt, I found that I had been overcharged for 7 items. I went back in the store and got my refund of the overcharged items - amount being $19.01 . Like I said this not the first time, now every time I buy something in this store I check every item I buy for the price scanned. I have 4 kids at home and I have to watch my budget. I feel it is a shame that I have to watch what I am being charged everytime I go in the store.