I keep on trying to unwrap a simple barrel but each time it turns out wrong. If anyone would be willing to figure out why I keep on getting what I do I’d be greatly appreciated. Results are below. Here’s the blend http://uploader.polorix.net//files/1487/Barrel._Unwrap.blend
You’ve got a lot of doubles in your mesh. That’s why you have four barrel ends, instead of two. Remove doubles, delete the current unwrap (Editing buttons, Mesh panel, big bold X next to the UV Texture name) and then unwrap again. Should be fine.