Unexpected Subdirectory Structure for Subdomain Groups and their Incorrect Links

I recently started creating a multisite having subdomains instead of subdirectories, and using the BuddyPress plugin to create several subdomain groups under each subdomain. For this multisite, I expected only a subdomain structure for each subdomain group, and not any “subdirectory” groups.

So I’m wondering why do my Subdomain Group Directory pages (e.g. subdomain.domain.org/groups) incorrectly show their group links as subdirectories instead of subdomains. For example, a group called “Test” has link subdomain.domain.org/groups/test/ instead of test.subdomain.domain.org

And I’m also wondering why does each group under each subdomain have both a subdomain structure (i.e. its own subdomain site that was expected and wanted) and a subdirectory structure (didn’t expect it, and don’t want it).

So, to repair these annoying problems, what should I do to get rid of the my subdomain groups’ subdirectory structures but retain their subdomain structures (keeping their subdomain sites intact), and henceforth have the groups’ links on my Subdomain Group Directory pages correctly point to their subdomain groups instead of pointing to their subdirectory groups?

Note that I’m not using a temporary or sandbox site, so I need to password protect my entire multisite while it’s under development.