Considerable performance dip in afternoons. Used to sleeping in the afternoon

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Would rather prefer a 5 hr exam from 9am -2 pm with a half an hour break.
Worried about entering the test area in the morning. 7500 ppl are giving the exam. I wonder why the exam wasn't arranged in all metros. Foolish.
As far as the questions are concerned, I gave official mock right at the end. Lots of questions aren't clear. In the sense, we have to make assumptions, which would vary from person to person. They seem to be playing on words.
Am really worried about Ethics.
Don't worry about 70%. There is 'curving', plus I believe one can clear even after failing 2-3 sections.
Here are my results.
Morning Afternoon
Official Mock 108 102
Exam 1 – Volume 1 96 110
Exam 2 – Volume 1 106 108
Exam 3 – Volume 1 110 104
Exam 1 – Volume 2 107 98
Exam 2 – Volume 2 109 104
Exam 3 – Volume 2 103 103