Reinforcing Doing Nothing

Q: I have been reading through all the articles on your website. I found one area of interest that is a little confusing for me. I have trained my dog using the clicker and she will do every trick on cue (with a word). When I bring my clicker out to try to teach a new behavior, my dog goes crazy and starts offering many behaviors. You state in the articles that a dog who does this doesn't know the behaviors on cue. But my girl will do all of them on cue. I am finding it hard to get her focused. Why is she going so crazy? Also, why do owners say their dog will only listen when clicker is present?