Hi
now that the contest ended and you have made your mind and decision about the winner logo, the winner gets the 1st place, but the 2nd and 3rd place and going on forward, 4th, 5th, 6th , etc , each one or slot should be filled with a separate designers and different concepts - this helps towards each designers' rankings and also it is a way for you to show your appreciation of the hard effort put in the contest.
Just a suggestion ! Thanks.