Guild Wars 2

Hi Guys. I’m having trouble understanding the achievement League Elite, i made diamond the first season and i reach diamond again few hours ago for the season two but i’m still not done with the achievement (Tier: 4/4 – Objectives 3/4 )
Is that ‘normal’ ?

You only make progress for one of those achievements at a time. You cross 1 division and complete first achievement, then you have to cross 2 more divisions after that to get the second achievement, etc.

u reach diamond last season, meaning u have to be in legendary this season to complete it.