While it's technically possible to obtain two distinct SSL certificates from different providers, it's not a recommended practice. This is because it can create confusion for users and potentially lead to mixed content warnings in browsers. Instead, it's recommended to renew your SSL certificate with the same provider or switch to a different provider that offers a seamless renewal process.

There is no problem with having two SSL certificates for one domain. This is useful for various use cases, such as EV SSL and wildcard SSL, or for separating certificates for load balancers. Make sure that the server configuration is correct in order to avoid conflicts and security risks.