Moving around and forward is not only a good idea, your dealer was polite at best, but part of the experimentation and the experience. Not going into technical details as many have pointed correctly the reasons behind it but try to locate them in the room where they sound more coherent to your ears, with a wide range of musical material. Depending on your speakers and room you may find that it would be an easy job or one demanding a lot of effort. All you have to do is enjoy, listen and be patient.