When re-installing the rocker shaft bolts, many/most of the book specs are wrong... too high! Torque these bolts 15-18 ft lbs.
As far as oil in just one rocker, I am not sure that has any significance. Was it at or near the back? Did the other rockers have oil around the shaft? Were the notches on the ends of the shafts facing down and to the left, as you look at each side of the engine?
