I believe the answer you are looking for, they are unequal lenght becuase they want a certain amount of camber change, reason being as the car turns and body rolls, you would get positive camber, not good for turning, with negative camber as wheel compresses, additional negative camber keeps the tire in better road contact. Its all a big set of compromises anyway. bump Steer refers more to Toe changes as the wheel raises and lowers, due to cornering, braking, or accelerating or some combination.

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.