Information Subtest Ended Early?

I received a 39 / 13.6 percentile result for the information subtest, which was surprising considering my overall IQ was 140 and the minimum result I received for any other subtest was 57.5 percentile (vocabulary)

This was puzzling so I purchased the information subtest again to ensure the results. I answered exactly the same as I did on the first attempt.
I am rather confident (although not absolutely certain) that I answered all questions correctly except the final two, which were to do with who wrote ‘the odyssey’ and the other to name a chinese philospher. I am pretty sure I got these both wrong.

This leads me to believe the test was interrupted early, causing me to miss out on the opportunity to answer subsequent questions correctly.