What are you saying, that it's not okay to ask for help with the last 10% of the material if you're already doing fine with the first 90%? Aim high, but not too high, is that it? It's not a troll, it's just a request for help - the OP even pointed out where he/she's having difficulty.
OP, If you have fifteen minutes after completing each VR section that's awesome and I'm envious. Have you tried going back to the humanities passages, reading them in more depth, and reanswering all the questions? If you have the time you can go through each question and look for the specific parts of each passage supporting your answer, then use the highlighting function on them, so that you can look at the big picture and convince yourself that you're satisfied with your answers.
Other than that you might try going back over all the tests you have at your disposal and reading up on why the right answers to the humanities questions are the right ones, as well as why the wrong ones are wrong. If you can identify some sort of trend in your mistakes with those questions you may be able to take steps to correct it.