My greyhound/pit mix knows my names of many of her toys. She also has a range of expressions she uses to disagree with me or tell me I'm wrong. Her favorite to

My greyhound/pit mix knows my names of many of her toys. She also has a range of expressions she uses to disagree with me or tell me I'm wrong. Her favorite toy is this kevlar llama unicorn that my mother has resewn for her twice. If I tell her to bring me her lobster (also kevlar) sometimes she'll shake her head, bow, and then stare intently at me. She understands the prompt for, "What is it?" and will lead me to the thing she wants or fetch it. On multiple occasions she's brought me her llama instead. I thought this was a fluke for a while but if I argue with her enough she'll go get her lobster. She has a really big toy bin and she plays with a lot of toys, so selecting these two by name has always been curious. She also has toys for different purposes. The remnants of a Lamb Chop long lost are her snuggle toy, she doesn't play tug of war with it anymore. If you try to she'll display the same expression for dissatisfaction.