I too am wondering why there are two sections called Reviewed Maps.
All I know is that the yellow one is where the reviewed maps go. Let me explain how this works.
There are a few selected people that are able to mark comments on an uploaded map as a review. Then it takes the ratings of all the posts marked as reviews on that map and averages them. Then it puts the maps in the order of the highest rated map according to reviews, in the section with the YELLOW "Reviewed maps"
Although I still haven't figure out what the GREEN "Reviewed maps" is for.
Hope this helped,
Lag_Reviews
PS: If I find out more, I will keep you updated.