I have no idea how this happened. I had my main domain.com up and running for almost a year and just recently added sub.domain.com ... both were running fine for a few days until I decided to add an SSL cert to www.domain.com to get rid of an 'insecure content' error. Everything now redirects to sub.domain.com I added the subdomain by adding a new website. I didn't use the subdomain or alias methods. If I deactivate sub.domain.com through ispconfig, I have access to www.domain.com again. I am using a wordpress installation for both domain.com and sub.domain.com and wordpress is set to use https://www.domain.com and https://sub.domain.com as the addresses for the sites. Where to start?