Did you replace both head gaskets when it was apart to fix #1?
If not then other head gasket could have been marginal because of the overheating caused by #1, and it blew.
If both were changed then yes, could be torque wrench issue, but probably wouldn't have happened that fast.
I used an old torque wrench, mine and working well for 25 years, until it didn't, lol, but had to redo gasket at approx. 9 month intervals, TWICE, then I checked it, was 20lbs light at 60ft/lb, so I was not tight enough.
Could have been a problem in the install, 40+ years and I still goof up
Not sure where the 76ft/lb comes from, you are using TTY(torque to yield) head bolts, so there is no ft/lb as final torque spec.
Tighten the bolts in five stages
Stage 1: Tighten to 50 Nm (37 lb-ft).
Stage 2: Loosen the bolts one full turn.
Stage 3: Tighten to 30 Nm (22 lb-ft).
Stage 4: Rotate each bolt 90 degrees.
Stage 5: Rotate each bolt an additional 90 degrees.
And you do need new head bolts again, once they are tighten to spec one time they stretch, when loosened they do not come back, so..........they will fail, could be when tightening them again, could be in a month of heating up and cooling, could be a year, so your money and your time, take the chance if you want.