The Prophet salla Allahu alaihi wa sallam was affected by black magic but not while he was sick and he had nothing to do with his death.

The Imam of our masjid was saying that the Prophet(saw) had some effect of the magic(done to him earlier) during his sickness prior to his death. Is it true and believed by scholar? should I tell him anything?

Biography of the Prophet salla Allahu alahi wa sallam | February 1, 2014 5:53 am
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It is narrated that Abdullah Ibn Zubair (radhiallahu anhu) saw a man raising his hands and making dua before completing his salah. When the person had completed his salah, Hazrat Abdullah Ibn Zubair (radhiallahu anhu) went up to him and said: “Verily, Rasulullah (sallallahu alaihi wasallam) used to only raise his hands and make dua after completing his salah”(Majmauz Zawaaid, vol. 1, pg. 169). Is the above mentioned narration authentic? If yes, then doesn’t it justify the practice of raising hands after salaah to make duaa?
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Why is that Prophet sallallahu alaihi wassallam didnt compile the Quran in the order it was revealed.?