Swingarm failure - torque arm mounting point

[fazersharp]

If you look at this picture the area around the mount point on the face of the swing arm looks ground off a little, also the welding on the mount point dosent look like a factory neat job,has this already been re welded in the past I wonder, I also see a different shock and dog bones as well as the non oem caliper and arm .
I wonder if its a combo of all these things was just too much of a change in speck for the OEM mount point