Guild Wars 2

I can read them and get credit for the achievement but they save inconsistently to the book. found 3/8 so far and only 1 has saved to the book

edit
completing the collection corrected the error I think, story seems complete anyways

I have exactly the opposite. read all 8 pages but it won’t give me the 8th and therefore I won’t get the achievement. Checked them all again but can not read them anymore. Is it bugged so i can not finish this?