Matt tells Latch to "stay close to me" when he smashes in Judge Flood's saloon door, and Latch jumps into the room right behind Matt. But Latch isn't seen at all in the next scene, beginning one second later when Matt confronts Judge Flood (it also looks like the editor left in Matt's cue to step on his mark).
When Matt and three others deliberately bury themselves in a mine shaft in order to dig toward the surface unnoticed, Matt swings the pick for digging at the level of his own chest, and the hole goes from his waist to his head when he finally reaches daylight. But when the scene dissolves out and back in to reveal it's now night outside, the hole is at floor level.
Matt and Latch walk up to the door of the Silverton Saloon to smash it down. The camera cuts to only a slightly different angle to show the back of James Arness's stunt double hitting the door.
Matt and three other prisoners blow up part of a mine shaft, leaving themselves trapped in the end section and trying to dig their way out. They leave one torch burning so they can see what they're doing, and it goes down as the oxygen in the air is used up. But you can tell the torch is gasoline-powered and controlled by a remote rheostat.
Usually, Matt and the men he works with dig in close proximity to the other prisoners, with cook Widge Spot and a guard very near at hand. But when Matt uses dynamite (planted by Widge) to blow up part of the mine shaft so he and his group can dig themselves out, there's not another man within at least fifty paces.