Maintaining menu and bc structure when cross-categorizing nodes

If you want your breadcrumbs to read Home >> Articles >> Blog >> Moods >> Elated, and you want your menu navigation to look like:

Articles - Blog
-- Moods (expanded)
--- Elated
--- Sad
-- Topics (collapsed)

when you're viewing a blog page, then you need to set the Menu items for assigned nodes setting (under 'Category menu items') to 'Enabled' for your 'Moods' container. You then need to set this to 'Disabled' for your 'Topics' and 'Sections (Blog)' containers.

I'd like it to read:

Home >> Articles >> Blog >> Moods >> Elated or
Home >> Articles >> Blog >> Topics >> Philosophy
depending on where I'm coming from.

This is not possible, as one page in Drupal can only ever have one possible breadcrumb path. Drupal does not support "breadcrumbs that change depending on where you're coming from". Drupal breadcrumbs are based on a page's primary position in the site's menu hierarchy, and a page can only ever have ONE primary position. This is why the basic hybrid tutorial encourages you to make Home >> Articles >> Blog the primary location of your blog items: because if you want to categorise your blog entries in multiple ways (e.g. under both Home >> Articles >> Blog >> Moods and Home >> Articles >> Blog >> Topics), then you can't have more than one of them as the primary menu location.

Hope that helps.