Game Mechanics: Shaman melee weapon skills bugged

[dethbringre]

So I noticed that on my shaman his 2H Blunt and Piercing skill both capped at skill lvl 52 when I was level 12. I dinged 13 and my skills went to level 56 and have yet to move again. I know Its random but this seems to be buggy, I hit skill level 52 at lvl 12 in less than 4 mobs. I hit 56 at lvl 13 in about 3 mobs as well. After several dozen mobs it has yet to go up again.

Seems to me that the skills might only be increasing by 4 per level. But its definitely not moving.