I ask because in the first half of Hunters of Dune (p204 paperback ed.) Sheeana is consulting her Other Memory and she's addressed by someone claiming to be Serena Butler. A few chapters later, this memory returns and Sheeana challenges it, pointing out Serena Butler's only child was murdered and asks how it's possible -- to which the Other Memory responds "Because I am" or "Because it is" (can't find the page ATM) before shutting up for the rest of the book.
A similar inconsistency occurs in the second half, around p415: the Baron Harkonnen ghola's memories are awakened ... but Alia is present in the Baron's mind.
Are these just continuity hiccups? Or is there some in-universe explanation?
This has bothered me for quite a while. The Herbert/Anderson books can get a little redundant but they're generally okay for continuity & consistency.