Am I cheating in my practice?

I am in the early PLI post course right now(the stuff before the 3 full exams) and I am doing the problems with the MPEP through USPTO.gov (where they have links to referenced sections making navigation easier, not just a big long PDF) in one window and Patware in another. I am scoring 90+% in good time doing tons of lookup in the MPEP. I am confused because I thought the instructors said that the post course materials were exam difficulty and that to do well on such questions you would likely need to know around 60% of problems from memory and then do lookup on the rest. At this point I only really know about 30% by pure memory, I am able to intuit my way to about 60% but by checking the MPEP on almost every problem I'm almost 100%. Is the software on the exam very different from my current set up? Am I cheating? Are their strategies just not for everybody?