When I am using the Garmin and wearing the heart rate monitor it always switches to the time / heart rate monitor data field and not the 3 field data that I had set up and started training with. I then press training and I cant switch it back. I end up pressing in lots of places and then after a couple of minutes it switches to the 3 field data field to then switch back to the time/heart rate monitor data field. How can I control this while training? I have basically resorted to not wearing the HRM so this does not happen.