Ok this is a noob question for sure but I just noticed that there is a slight offset in the line of my crank arms. If you place the cranks horizontally and look at them from the rear at their level one clearly bends up slightly so that one pedal is 2-3mm above the other. I have a square taper bb so I know its not a spline issue. Is there any offset designed into this type of bb spindle or have I twisted the spindle out of shape. Also, could I have bent the cranks, they are aluminum but cheap?