"Several of the head bolts did NOT torque smoothly. Can I loosen the head bolts and re-torque them again or will that mess up the copper spray sealer?????"
you can, loosen the head bolts one at a time and then re-torque to the 55lb and 70 lb values, that should cause no major issues if done within 6-10 hours. and ID point out that bending a copper head gasket slightly is hardly a unique experience, I would not be overly concerned, thats one of the reasons they work well, they are rather pliable, in fact you can re-use copper head gaskets after cleaning and careful inspection 2-3 times with new copper coat added.
So you are saying don't loosen them all the way, just back them off a little to hopefully to 55 ft/lbs and then re-torque to 70 ft/lbs.....right ?????