I remember Steven explaining this some months ago, but I haven't been able to find the post by searching.
What settings are carried over between multiple libraries, and which are unique to each library?
(Edited because my original question was redundant!)
Second, how does MusicBee recognize a podcast as a podcast? I have a podcast that I originally downloaded as separate MP3 files, long ago moved to audiobooks, even put the audiobooks tag on it, and when I scan it into a new library MusicBee still puts it in podcasts.
Nevermind, figured that one out myself. I see that there's an iTunes Podcast flag, similar to the Compilation flag.