they are never answer our question about this. ;P

Yes, it is true! If you do not rank up, but you have already reached the Six Paths Sennin rank once, Your latest rank will be reseted! At the same time, you will be rewarded with the highest rank you've achieved in that http://forum.naruto.oasgames.com/en/forum.php?mod=viewthread&tid=14387&extra=page%3D1