If the brake controller has an adjustment for the trailer brakes, make sure that you adjust accordingly before every trip.
When adjusting, get moving at about 10 to 15 mph and apply the brakes enough to feel how your vehicle is responding. You do NOT want the trailer to "push" or "pull" the TV. You want them to have the same amount of braking applied. It does take a little bit to get a feel of how to adjust.
My dealer did have mine set WAAAAYYYY to high after we did our walk through. Of course, you leave the lot and they don't care after that!