BTW, this wouldn't be a bad time to loosen and reset the other bolts. But beware, they tend to stick in the head and need a fair amount of torque to break loose. A deft hand is needed to avoid breaking the head off. Having said that, there's an issue if one won't come out and it's a hassle if one breaks. One that won't come out is only going to get worse. A very small amount of anti-seize can help.
P.S. "I'm missing 1" That should never happen. What gives?