I think we have threads on this in the past. Mine is the same way and I have not had a problem.
I wouldn't sweat it, but just know which direction your element goes so that you can place your wood over the burner.
I think this is why many people think that the back of their box burns hotter. When in reality, they may be placing their wood in the box to one side of the element, thus giving this illusion that the element is hotter in the back verses the front.