ahnenforscherschmitt

I found out how to merge sources.  I just needed to tweak my search of these forums.  However the problem with the comma still remains.  I got a source from a database on Ancestry.com.  So I think the author should be "Ancestry.com," correct?  However, RM treats "Ancestry.com" as a person's last name and adds a comma before it in the bibliography:

, Ancestry.com (rest of bibliography)

Is there a way to eliminate the comma?  Or should I be using a different source type?  Or should I leave the author blank?  In which case the bibliography begins with the name of the database in quotation marks.  Would that be correct?

Any help/suggestions would be appreciated!  

Thanks!