To start things off, my guild and I are just beginning to get back into doing raids. I have been gearing up from heroics, badge gear, and rep while doing research from these forums, shadowpanther.net, and EJ on how to play / progress my toon. Now, IIRC, according to Vulajin the new hit caps for WotLK are ~8% for specials, and ~27% for dual wield white hits. My hit is at 11.34%, expertise is 25, including gear and talents.
Now for my problem, today I ran 10man OS, 10man VoA, and 25man VoA.... and I missed, a lot. On 10 OS and 10 VoA I have somewhat reasonable numbers on misses, but my miss rate on 25 VoA is bizarrely high, to me at least. A Recount from 25man VoA says my swings missed over 27%(129 times) and SS missed over 12%(14 times). The expertise mechanics seemed to have worked correctly as I was only dodged 0.1% from my white hits and 0.2% of my SS for all of the raids.
Here is a WWS of the 3 raids, this link goes to data from my toon covering all bosses, be sure to check out 25 Archavon by itself as well: http://wowwebstats.com/omon5oif1ses1?a=x2f3786&s=bosses
Here is my armory: http://www.wowarmory.com/character-sheet.xml?r=Alleria&n=Narchost
So... why is my miss rate so high? To me, the numbers don't make sense... Am I bugged? Did I just have a bad run-in with the RNG?