@ willyloman - we had the same outline delivered 3 times in 2 months in our old cong. It was interesting, however, that no one seemed to pick up on it as each speaker delivered it significantly differently from the others.
I also started turning up with different outlines than the ones assigned; you get sick of giving the same talk over and over and over again. On one occasion I was assigned to go to Rutherglen Congregation and I'd been out all day Saturday watching Scotland play Lithuania at Hampden Park, then we'd had friends over very late that night and I hadn't got the chance to properly rehearse the talk (which I always left to the Saturday afternoon before I was due to give it). I'd only had about 4 hours sleep, so I just took an outline I knew inside out and delivered that instead.