In both scenes, when Tillie is talking to Lawton and then with Capt. Robbins, the pencil she has tucked behind her ear can be see when she's filmed from behind, but when she's filmed head-on it disappears.
In the final scene Dr. Vornoff lays Janet down in the swamp and runs off to the left and is followed by Dick and the Capt. When the doctor is finally killed, Dick and the captain leave to the left again only to enter from the left in the set where Janet is.
During the climactic shoot-out with Lugosi, Craig and Lawton are shown huddled on the ground looking up at the battle. A moment later Craig runs uphill towards Lugosi to confront him. In the very next shot he is shown coming downhill(over the crest of the hill) from behind him.
Many movie sources cite that in this film Bela Lugosi flubbed a line in which he described Tor Johnson's character as being "harmless as a kitchen". Legend has it Wood didn't have time or money enough to do a second take. But on watching the movie, one discovers that Lugosi says the line correctly.