1)Under username profile, the rank and profile text overlap.
2)The rank itself does not update (not 100 percent sure though). The rating in the profile is different than the one in the player rating list.
3)In regards to the top player list.
I personally would return the list for ALL players except,
a)provisional players (the ones with little games played until they reach x amount of games played)
b)players who were reset for cheating or boosting.
This makes the rating list of players more accurate.