Specifically, I'm working on overriding album_view. Which means creating a file called plone.app.contenttypes.browser.templates.listing_album.pt in the overrides folder.
While both sites are using album_view for some reason Site B is reporting a different template.
Site A has template-album_view as one of the classes on the body tag.
Site B has template-plone-dexterity-interfaces-idexteritycontainer
I tried to replicate the issue on the zope server running Site B by creating a new plone site (we'll call it Site C).
The new site (Site C) does NOT behave like Site B. Instead when I set album view on a folder I get: template-album_view as one of the classes on the body tag, just like Site A