How does concentration affect The Position Of Equilibrium? I was taught that
when the concentration of the reactants is greater than the concentration of products then the position of equilibrium is shifted towards the left.

However when I used La'Chateliers Principle then we know that if you increase the concentration of reactants then the system wants to revert that change a hence produce a higher concentration of products (and subsequently a lower concentration of reactants) but wouldn't this then mean that the equilibrium would shift to the right?
You statement of Le Chatelier's Principle is a perversion that isn't true. The equilibrium does not depend on the sum of the concentrations of the reactants relative to the sum of the concentration of the products. 

Your analysis is correct.