librarything unrecommendations

Librarything has an UnSuggester, shows you books you don’t want to read based on your reading habits. So if you’ve read Fruits Basket, you don’t want to read Sartre, Aristotle, Karl Marx, or Grisham.
I wonder if the unsuggestion data for comics and manga is a little skewed, because I only use LibraryThing to keep track of graphic novels, knitting books, and YA books. So I’ve actually read some of the things on the unsuggestion list but because I haven’t entered those books into my collection there is no way for librarything to know that.