The 404 for members, blogs and groups directories is a known problem. It’s been reported in Trac. A workaround (thank you wardeh) is to create three dummy pages with the slugs:
Doesn’t matter what you put in them. It won’t display.
The diagonal display is due to the fact that the member directory css needs to be modified to fit your theme. The directory css files are located:
members – /mu-plugins/bp-core/css/directory-members.css
groups – /mu-plugins/bp-groups/css/directory-groups.css
blogs – /mu-plugins/bp-blogs/css/directory-blogs.css
i knew it was something simple, but didnt want to mess anything up to majorly.