Violation?

Yesterday I was at Wal-Mart. In a miracle of miracles I was able to walk out with only a package of dental floss. This has never happened to me before. My measly purchase came to a grand total of $0.96. I handed over my dollar, thinking of where I could go next to spend the money I didn't end up spending at Wal-Mart. I had my wallet's change pocket unzipped and my hand open, ready to receive my change, when the clerk reached over my hand and placed my 4 cents directly into my wallet. This is weird, right? I should feel violated? Because I did. I laughed uncomfortably and answered no, I did not need a bag and left. This seems like something they should address in Wal-Mart etiquette.