Animux, I'm from Ask Mr. Robot, and wanted to stop by and help.
First, I want to note that Mr. Robot accounts for your racials. You get 1% Exp for being Draenai, and Mr. Robot knows this. So when he says you are at 14.84% hit, he is already adding the 1% Exp racial into that total. So you should NOT add it yourself, thinking you're at 15.84%. Does that make sense?
When I plug in your character, Mr. Robot gets you to 0.16% under the hit cap. In this setup you get 176 extra INT and 194 extra Spell Power, both of which are really important for your spec.
Then I checked the option to force the hit cap (a new option we launched a couple weeks ago). Now Mr. Robot gets you to 15.20% Hit, but you don't get the extra INT or Spell Power. So it's up to you which one to choose. Here's a link to the hit capped version