Sadly, adding logos and to core logos alone will not allow you to use logos in the faction editor. You CAN REPLACE logos, and you can simply rename them so that they are ordered differently.
For example I plan on grouping all of the different animal variants together for ease of use and organization.
PS: Yes I know you can add the logo to the faction through the XML. But for ease of use for non-modders (the people we may be aiming to please) this is a bummer.
