So I have all the achievements under the League section, except for Supreme Being, which is the achievement you get for having all the League achievements. When I click on Supreme Being, it says i'm missing Counter-Proof (attack for 20 seconds without a counter-attack), yet that was the first League achievement I got. Any ideas?
It appears so. When I browse your achievements, I can see you have Counter-Proof, as well as all the other League Combat achieves, yet no Supreme Being. I guess try reporting it as a bug, not sure if there's any work around for it.