Rio 40 Degrees Wrong Data

Rio 40 Degrees, one of the greatest classics of brazilian cinema, is wrongfully labeled as a "documentary".
I tried to correct it two times, but it was rejected. I can't understand why.

It is a fiction movie, with a scripted story and actors playing characters. It doesn't even try to be some kind of fake documentary. It is a neorealist movie, like Bicycle Thieves. 
It is one of my favorite movies and I know what I am talking about. I can't understand why the IMDb guys are not accepting my correction, since categorize this movie as a documentary is simply wrong. 
As a "documentary" this movie will not appear in the results when the users search for feature films. So, please, correct it.
In case you have any doubt, just take a look at the movie itself: https://www.youtube.com/watch?v=MeLnOLd3kD0
Thanks.