I dont see a problem with skipping others for one that fits the best, hell I was about to do another dedication I can pop them out like a pez dispenserDoodley wrote:
It's more like there's a lot of good art being contributed for one achievement, and it would be better to use all of the art for different achievements rather than just take one of them and skip the others.

If someone out do's my ideas I would like that persons work published instead of mine it wouldn't seem right for me to be chosen on the basis that I did it first let alone set an avoidance in place to deter a person from producing a work that may or may not be superior to mine.
Aslo all requests have been filled so I don't see a problem with dupes at this point since the demands has been satisfied.