I am a relative newby, having taken up this hobby just over a year ago. I have a Nexstar EP RTF. Last Tuesday, during preflight, I found that channel 1 (airlerons) was reversed. All other channels were correct, so I switched it in the transmitter and flew three flights. 2 long time flyers (club members) at the field said that this had never happened to them, 1 said that it happened once before. My concern is that this may happen again (possibly inflight). Is this something that I should be concerned about or not?