Other mistake: When the Narrator looks at the photographs in "The Denton Affair" album, some of the photos don't match up with what actually occurred in the previous scene. Things such as, when the car pulls up, and the driver exits and moves out of view, there are only a few people left on the porch, but in the photo there is a crowd on the porch.
Continuity mistake: During "Sweet Transvestite", Frank throws his cape off onto the throne. Part of the cape is over the left side of the back of the throne and the front of the left arm of the throne is not covered at all. There's a cut to Brad & Janet, then when it cuts back to Frank the cape is evenly draped over both arms of the throne covering them all the way to the floor with none on the back. (00:25:15)
Continuity mistake: When Brad, Dr. Scott, and Janet are turned into stone, their clothes fall to the ground. Dr. Scott's and Janet's clothes turn to stone, but Brad's remain cloth. When Columbia and Rocky are turned to stone, Columbia's clothes completely disappear (there is nothing around her feet when they are shown a few shots later). We never get to see if Rocky's are cloth, stone or nothing. (01:12:30)
Continuity mistake: After Brad and Janet arrive at the lab, when Frank-N-Furter holds out his right hand to shake their hands, his left hand holds a champagne glass and the rubber gloves. The gloves go from lying over his pinky, to over his hand, to over the middle finger, between shots. (00:30:10)
Continuity mistake: When Riff Raff kills Columbia, she falls beside the spotlight, whose tripod base is at the aisle, directly behind three beach chairs in the last row. But when Riff Raff turns back around, the spotlight is gone and the last row consists of two beach chairs. (01:30:00)
Continuity mistake: When Rocky is first seen in the tank wrapped in bandages until he starts to stand, water is clearly in the tank but when he stands up fully, his bandages are completely dry.
Continuity mistake: During "There's a Light" Janet's sweater changes colour. First it's white, then blue, then white, then blue, then white. In the car, it's white, once they get out of the car, it's definitely pale blue from all camera angles and gets slightly darker as it gets wetter, then there's a 7 second shot where it's definitely white, then there's another two shots where it's blue, then they reach the door and it's white for the remainder of the time it's in the movie. It's been suggested that there's colored lighting, but nothing else picks up nearly that amount of blue, i.e. her pink shirt isn't lavender, its white buttons aren't blue, their teeth aren't greenish, etc. (00:13:55 - 00:17:15)
Continuity mistake: Before the floor scene starts Dr. Scott does not have on the fishnet stockings. As he rolls across the stage the stockings are back. (01:23:30)
Continuity mistake: During Columbia's solo in the floor show, her corset falls down. When she shimmies across the stage, she tries to fix it, but it doesn't work. In the next shot, it's perfect again. (01:17:05)
Audio problem: During the dinner scene, just before Dr. Scott says, "We came here to discuss Eddie," we can hear a banging sound and see his wheelchair move back a little bit. (01:05:50)