Couple questions, all about bolts.

Actually you can't verify torque by trying to tighten a fastener that is supposed to be torqued to a certain level. It will always take a higher torque number to initially start a fastener turning than to keep it turning. So you should always back them off at least 1/2 turn, then bring them back up to proper torque setting in one smooth motion. Retorquing non-torque-to-yield type bolts does not harm them. Over-torquing them certainly can.