Why does my copying stand not hold the camera vertical?

So you need to shoot some photographs for your next video. Perhaps it's a family reunion, video scrapbook or memorial video. Perhaps just a video photo album to send to your sister in Denver. You decide that shooting the photos right out of the album is not an option; the album pages are yellowed with age and would look awful on video. When you zoom in to frame the shot the image is so shaky it's sickening. So how can you transfer those snapshots to tape with high quality results? What you need is something called a copy stand. For decades photographers have used these stands to shoot "copies" of photographs and artwork with still cameras, hence the name.