Examples of common position mistakes - Uneven contact
This causes unclear instruction to the horse and uneven balance on the horse.
It may cause more flexion on one rein than the other therefore not working both sides of the body evenly
This will then create an unbalanced horse who will not become evenly supple and straight.
You should have elastic elbows that follow the movement of the horse
There should be a line from your elbow, to your hand to the bit
The contact with both reins should be even.