Hello Roland,
For me, I chose the study mode in small portions, 30 questions a time, twice a day. I carefully reviewed all the answers provided for each question. Unlike some other sites, with PMPrepcast questions, you see the explanation for the right answer and the wrong answers for each question. In my opinion when studying for the exam, someone spent a great amount of time to write explanation for these, I ought to spend time to review them all. It helped me to understand why it's the wrong answer or the right answer to the question. In the real exam, sometimes the question is so vague, so it helps to eliminate the "bad" answers to guess the right answer. Therefore it helps to learn why the right answer is right and the wrong answers are wrong for each question. My advise is not to use the exam mode when you're still studying and not yet confident. You will get frustrated at yourself, for me, I lost sleep over it at the beginning.
Rather asking whether the same questions will appear in the real exam or not, you should focus on utilizing the questions and the explanation to train yourself, sharpen up your ability to pick an answer within one minute for each question. The 1200+ questions on here has great coverage of the PMBOK materials. Start with smaller portion, learn the explanation for each and everyone answer, and believe in yourself, that will you make it in the end.
I'm sure others will have more inputs and/or different ways on how to proceed with the exam preparation, but rushing into taking the simulated exams and getting frustrated, losing confidence in yourself is not the right way. Trust me, there will be a day when you look back and laugh "why did I worry too much about failing the PMP exam?"