מיתתו של שמואל

Dear Rabbi Sherlow,
Please forgive me for writing in English. Please feel free to respond in Hebrew!
I also understand that you are
very busy so apologise for using
up tour time and understand if you do not answer me.
Firstly, thanks you so much for your teachings. I find them really inspiring and consider you to be my Rav in some sense even though we have never met.
I have been learning Sefer Shmuel. I just learnt about Shmuels death. Your videos on youtube and other resources online did not really deal with the fact that Shmuel's death it mentioned twice. I saw an
answer about different Neviim (Shmuel/ Gad/ Natan) writing about Shmuel's death which explains why it's mentioned twice. This answer did not sit so well with me as I was disturbed by the fact that it seems to treat the Tanach less as a perfect divine/ divinely inspired text and more as a collection of passages messily stuck together.
I was wondering if you could help me with this problem…?
Thanks so much