Dave,
The black base to which the "blue man"is attached is in just the wrong position. Gently pry up the base so that it is not hooked over the end of the car. It should be free to swivel slightly between the barrel channel and the inside of the car end. Thus when a barrel contacts the pivoting base, it will be directed off the car. If you have the loader, the barrel should roll from the car, then over a small metal shelf which clips onto the loader, and then onto the loader itself. By adjusting the voltage as you operate the car and the loader, you can load and unload barrels fairly reliably with only occasional manual intervention.
I hope that was somewhat clear!
Good luck.
Joe S