Cannot delete SSL certificate

Hi, can anyone help please?

I go into SSL Cert Manager in apache settings, and one of my domains will not delete the certificate, I have the following in paths.

DocumentRoot: /home/username/public_html/doctor
SSLCertificateFile (file not exists)
SSLCertificateKeyFile (file not exists)
SSLCertificateChainFile (file not exists)

Now although I've deleted the domain name for the above (the database has gone, the files, the folder, everything for the domain) the certificate is still showing for the domain, and it wont delete?

Another question, is that one of my domains certificates has expired, but will not auto install again? And when I run auto renew, it still says expired.

And last question (thanks) is that some of the domains show the IP address I allocated to my local server, and some show the ip of my broadband line (the actual ip address) Why do they show two different ip addresses in the column titled 'IP' in the 'SSL Cert Manager'f?

Many thanks, if anyone can help.

Regards