If you even have the slightest feel of feed back, it will get better in the future...I promise. The best way to tell it's working is using the brake/ boost button for braking. You'll feel it there the most for now.
As Chris said there is a whine similar to the Miller Engineering Signs.
Hot batteries not good but since I do not use the charger I can't tell you how hot it should get.
Contact Lionel and let them advise you.
And CAB2 dose rock.