I had blue belt, but then I was reseted on white. now I've reached brown but still unranked...
Why that happened?

Many people lost a couple of belts during the 3.1 to 3.2 change

And the Unranked problem is probably just "no offence" the shittines of our ranking system atm.

our rank system is pretty bad (no effence) lol

Stuff needed to be rolled back due to people abusing a certain little room.