Lensatic lens does not focus on the dial! - Brunton Military Style Lensatic Sighting Compass

This is the first sighting compass I've bought, I couldn't figure out how to make it work, and I thought that I was not using it correctly. Two months later I went on a wilderness survival training weekend and showed one of the instructors my gear. I asked an Eagle Scout how to use it. He took it, opened it up with familiar ease, and started describing the steps to using it. He stopped, tried moving the lens around, and finally agreed it was broken -- the focal length of the fixed lens was not appropriate for this application.