Necrologos levemete bug

I've had this problem in areas of Gridania and La Noscea where I'm supposed to kill targets so they'll drop pages but the pages do not drop when I've killed the targets. I've literally killed every marked target and not had a single page drop for these types of leves.

Some Necrologos type leves aren't "kill mobs to get pages". There are sometimes just pick-up-able pages on the ground near mobs. Sounds like you had one of these and didn't notice.