For example I have the achievement for reaching level 20 but not for reaching level 10.
Another example is I never got the achievement for killing the skeleton king yet I am through act II at this point.
It is my understanding that the achievements are on a character to character basis like WOW is right? I can always go back and kill the skeleton king again on normal np, but I cannot reach level 10 again.
I am sure I am not the only one with this problem, is there a plan to give players credit for some of these achievements?