Also make sure that the control surfaces, directions and trims are set equal on both controllers before you fly. Now, for the sake of the instructors, remember they are volunteering their time to teach you how to fly. Treat them with respect, and listen to what they are saying. You'd be surprised how much a bit of time over a cup of coffee will do after a training session. I call it my debriefing session.
Most instructors take training very seriously.
There is a great deal of appeal to the thought of flying your own plane freely around the sky. But you must earn that freedom by learning the technical aspects as well as developing an ability to control your plane in a safe and responsible manner. Reality starts to set in as they realize, flying RC is not as simple as it looks. Even after one achieves their wings, I have seen too many inexperienced pilots rush out and purchase a low wing sport plane or war bird, thinking they have the ability to handle the plane. This is like taking a real pilot after getting his pilot's license in a Cessna 150 and putting him into the cockpit of an F-15 fighter.