Currently, anyone who has completed a mission, no matter what rank that mission is, they are shown for completing it, regardless of how high their rank is.
For example, I have completed up to Rank 4, but am shown on the past 3 ranks as well. To me, it seems implied that in order to get to Rank 4, you had to have completed Ranks 1-3 anyway. I think this will make it look a bit cleaner especially when there are even more contestants, as the competition goes on.
For redundancy's sake, can we have it so only a unique Gravatar appears for the highest rank you earn?