We have seen 2 mistakes result in 79%
It seems there are some weird situations that are a combination of question bank that does not contain many hard questions, sometimes previous section that had a low score, and impacted the starting point of the next.
I have asked GMAC about this strange situation but only received a canned response 3 weeks later.
Same situation as yours by the way 😢:
https://gmatclub.com/forum/4-mistakes-y ... 27760.htmlPosted from my mobile device