This is an age old issue with those who replaced their bolts with Brent's stainless kit. To those who are newer to this forum and decide to replace the bolts OR who are just removing and replacing their original bolts for whatever reason, remember that the torque specs are just 9 Nm. which is nothing more than hand tight with an extra quarter turn. Cast aluminum doesn't like the he-man approach to wrenching.
It seems that the clutch cable bolts were the only ones that ended up stripping. (mine never did using the 9 Nm torque wrench setting) Had I been doing it by hand I'm sure I too would have overtightened.