When Lt Shaw gets off the boat and asks a man on the dock if he is Dr. Miura, there is a lone worker cutting fish on camera right. However in the next immediate cut which is a reverse shot; there is now an additional worker selling fruits standing next to the aforementioned worker cutting fish.
Lt. Shaw has his 1911 pistol with the hammer down when they confront Dr Randa in the Philipines. No soldier would have his 1911 uncocked....ever.
He then cocks is as a threat to the doctor. after he stops threatening he uncocks the pistol again. The 1911 pistol is designed to be kept in the "cocked an locked" position. hammer back and safety on.