I apologize if my comment sounded rude. Let me just say that this was a comment in general. I am sure that you are correct in saying, that this kid should be ranked.
One of the variables that you mentioned was that he has beaten 10 of the kids on the list. That is out of 140 kids listed. I am assuming that the 10 kids that he beat are spread out over many weight classes since it has been ten years time. You also mentioned that he won a tourney with two of those kids listed, but you did not mention whether he faced either one of them.
With different wrestling styles involved,( this is a general statement), sometimes one kid can have another kids number, and still not be an overall better wrestler.