Responses
On your second point, it's probably how the book is written - if it's third person omniscient (aka, all points of view), then the reader sees the "whole" story as it happens. If it's a first person POV, then yes, the story is only limited to the main character's pov. I assume the book read by Eve is third person, so that's why Eve is puzzled by the changes.

ugh the crown prince is such a bitch standing on his moral highground "i consider you my brother" while acting like a green tea bitch and siding with his brother's oppressors
also i never get how the reincarnated fls never consider the fact that the book isn't the whole truth of the story, i mean, who wrote the story and from who's perspective, bc from what we've seen so far, it's definitely from the crown prince's