Bolt Elongation

Someone put some hurt to it. Look at the direction of the raised burr that happen when a tool slipped or failed.
The raised burr is from me while using worn 12 point socket I put a 3 inch extension on the snap on clicker torque wrench, thinking the additional height would give me a better angle, obviously it did not. I then changed to the 6 point deep impact socket. The deep socket gave a better angle and a secure grip on the bolt head.
And yes I agree the bolt was over torqued and most likely I am the one that did it, as I have had this diff apart three times over the past 10 years.
Tying to figure out how I did it.
I too like beam style wrenches. You know they are right. I don’t have a digital torque wrench, I will look into one of those.
Thanks.