When I had my problem, my line trace was detecting all the different components in my character. I printed the results to the screen and ended up with this:
So what I ended up doing was setting all of the extra components to NoCollision under the presets for collision, and the capsule component was set to Pawn and Mesh was set to CharacterMesh. I also made sure that the component tree was in the right order. It worked fine after that. I only get 1 collision now when tracing it.