Sometimes if you are crooked in the box pull out and use the top left parallel parking cone as a reference to get straight

Good example I've see because once u straight line bk I'm seeing where your wheels turn to get the trailer n the box

lol he hit the cone but still well done

When you did hard_left and Hard _right, You should have seen two cons, what you have seen were 3 cons,, you went too far ...You could have to pull hard Right and Hard left to come back to Two Cons, ...That is why when you straightened your truck trailer, you are too far to the right ...Lucky you it is offset , if it was parallel parking , you would be in trouble , for offset , you can adjust it with your free two-pull-up,

Why are you teaching with a pup and single axle