seems some people always have trouble with the cam gasket.
first off... the cam cover itself has bits cast into it that hit the surface of the head. this means when you tighten the bolts up, the second you feel the bolt go tight, that is it. doing it up more wont compress the gasket more.
forget the torque wrench just "nip" the bolts up.
Second... when fitting a new gasket be sure BOTH surfaces are free of oil.
the way i do it is. clean oil from both head and cover. then apply a thin bead of instant gasket into the cover on the over. now press the new gasket into this grove, then a small amount on top of the rubber gasket then fit.