Swingarm failure - torque arm mounting point

[fazersharp]

when you pull the wheel back the distance between the calliper torque arm point and the swing arm fixing point stays the same,the holes are round not elongated, what changes is the calliper rotation which is catered for by a greased pivot point at each end of the arm held inplace by a 23nm bolt that still allows for a pivot on calliper rotation when the wheel is pulled back.
That's how I am seeing it.