In the scene where Wayne Barclay has just had the second attempt on his life at his girlfriend Lydia's apartment, just as he's leaving, he has his arm around Lydia in the medium shots and is only holding her hand in the long shots. The arm position becomes noticeable because it cuts back and forth between medium and long shots a couple of times.
When Terrell reaches into the desk drawer where the two .45 handguns lay and pulls one out and racks the slide to load a round, the camera stays on the gun and the clip is empty as no round gets loaded.