Best Why?

Finally the TV I purchased was in stock and I went to pick it up. After speaking to the sales associate in the home theater section, he directed me to customer service. I handed the customer service representative my receipt and a wall mount I wanted to purchase. I told her I'm here to pick up the TV and I want to purchase this item. She said why do you want to return it. So figuring she always hears about returns and was in that mode I politely repeated myself. She said ok and I figured we were getting some place. Then she went to the cash register 2 feet away looked at the receipt again and said what are you picking up? I said the television. Sure receipts these days are more confusing then ever, but there was only one item listed! What else could I possibly be picking up! Then she comes back, looks at the TV mount and asks why are you returning this?