Hello Sylvia,

To link two websites together, there are a few considerations you need to keep in mind:

1. Ensure both websites are created within the same Odoo instance: Make sure you are using the same Odoo installation and the websites are created within the same database. This will allow the websites to share common resources and configurations.

2. Configure website routing and menus: In Odoo, you need to configure routing and menus to link the pages of website A to website B. This can be done through the website builder or by customizing the website routes and menus manually.

3. Check website domain configuration: Each website should have a unique domain assigned to it. Make sure that the domains of website A and website B are different, so they don't conflict with each other. In your case, you mentioned that the domains are different, which is good.

Regarding the issues you encountered:

1. Removing website B from the list of databases in Odoo: Removing the database alone will not remove the website from the list of websites in the Odoo settings. If you want to remove website B completely, you should go to the Odoo settings, navigate to the Website application, and delete the website from there.

2. Creating website B again: If you want to create website B again, you need to make sure that the database for website B is created separately from website A. Each website should have its own dedicated database. When creating a new website, you should choose a unique database name.

If you are still facing issues or have specific error messages, it would be helpful to provide more details about the problems you encountered. This will enable me to provide more specific guidance and help you resolve the issues effectively.

Please let me know if you need further assistance.