User Login

This plugin works great. I do have couple questions:

1. I noticed that the Memberful password doesn’t match. So if subscribers try to login in WordPress dashboard the password set in Memberful doesn’t work. Is this a bug or intended?

2. Is there a setting or an option to prevent multiple logins at once by the same username? I’m wondering if a plugin like this will work https://www.ads-software.com/plugins/prevent-concurrent-logins/