WordPress Multisite (Network) some site users added to main site users list as subscriber

Question

We have installed WordPress Multisite (Network) and created some sites.

On the main site admin > users, it displays some users from other sites listed as subscriber user.

Please advice how this possible?

Answer 1

That is expected behaviour.

From the codex on Multisite Network Administration:

By design, all users who are added to your network will have subscriber access to all sites on your network. To allocate a different default role for users on individual sites, you must use a plugin, such as Multisite User Management.