Simulation is different from wolk in game stats

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ok so when i follow the advice of ask Mr. Robot and look at stats on website compared to in game stats, they are totally different like way off. so how is this happening is ask Mr. Robot bugged. I’m a prot pally and going for hit cap and exp cap also am def capped. here the problem ask Mr. robot tells me I should be at 9.40% but i am clearly 6.62 % . for hit cap, then on expertise cap in wow it is telling me im 26 which is like 169 but on ask Mr. robot saying 18 im like what the heck is going on here.

Check out this post, after giving it a read post again if you still can’t get it to match.