In Ballroom competition, a couple usually receives a first place, when uncontested, unless they are off time or dancing out of category. In this case, they will receive a second place. This is quite common, especially when dancing the mambo. They are usually scored on the syllabus for age and category danced. If dancing on time and having fun, a couple deserves a first place for an uncontested event. Unfortunately, there tends to be many uncontested events. I'm guessing that the same applies to CW competitions.