Yes! I did see some repeat questions on GMATPREP , primarily in the SC part, and a few CR's . Probably because many of them were already answered by me on GMATCLUB. So I will agree that yes , my score can be inflated because of seing some questions previously. But by almost 20 points in Verbal is what scares me...
I did solve around 10 sets, with not more than 8 wrong in Verbal, and repeated the OG , with a hit rate of greater than 90% in SC, CR and RC's.
Im unsure of what went wrong in the test. Maybe my first few questions were wrong, and therefore I got an easy Verbal test, which made me feel that Im doing very well, and built a false sense of comfort. Im still not sure, as unlike the GRE, we cant order a score report which shows the sequence of incorrect questions and answers..
Anyways, all I would suggest is do your GMAT PREP well,especially the Quant Section. A lot of repeated questions, some with identical values appeared on my test. Some had different values but exactly identical approach... Its possible these were experimental questions, but in the test every question counts...
Also I dont think I was nervous on the Verbal Section, the first time I took my GMAT in April I got a 35 Verbal, and I was nervous then as I found the Quant to be much harder than what I had prepared for, and that reflected on my Verbal. But this time, I was calm, I felt my quant had gone well , and there was no nervousness when I started the Verbal test... On the contrary , with each question confidence was buildingup, as I saw almost 3 - 4 CRS in the first 5 questions , which made me feel that I am doing well.. This usually happened in GMAT PREP when I did well in quant..