Non-existing subdomains redirect to first site created and strange ww.w urls indexed by Google

Hello everyone,

I'm new to the forum and new to virtualmin as well.

Few weeks ago I installed webmin/virtualmin on centOS and added two sites to it.

After a while I noticed that Google indexed some strange urls for both sites, with strange urls beginning with https://ww.w.domain1.com/path-from-domain2 and vice versa.

Later I noticed that when I enter nonexisting subdomain for both sites, it redirects to the first site I added to virtualmin.

Also, both sites have ssl certificates installed.

I guess I messed up something with http to https redirects.

Any idea where to start from in order to solve this strange behaviour?

Thanks in advance, Djordje