Re: Bitcointalk forum ranks question.

i have read around about bitcointalk forum ranks and according to this post i should be now rank Junior Member since i have 31 activity.

I guess that you've missed the note from the start, so I'll post it again:

Ranks

Update on 9/19/18: Merit points are now added
In addition to the activity points, merit points (click for more information) are required to advance your ranking. You will need at least 1 merit point before you can be a Jr. Member (click for more information).

Basically the rules have changed not long ago and the users without at least one point of Merit have been demoted to Newbie.