the first pop do you mean the 11 fired? if it did clean everything and make sure your powder is good / nipples clear........the 2nd one i've had the caps not fire if there not all the way on the nipple..if the click is the plunger hitting the cap its probly not the safty the safty should stop the plunger...it could be a bad cap/or not on good....i have had a cap not fire and when I looked at it I could see the hammer(sidelock) hit it and crushed it onto the nipple more and the 2nd time it fired