Virtual server accounts directory duplication

I found a strange problem. My every new host home directory contains directories with the name of previous host accounts created.
e.g.

  1. a.com has a space and directory /home/a, it will create directory structure as /home/a/a
  2. b.com is a second v server its directory will be like this, (/home/b/a and /home/b/b), the next v server will have three directories and so on.
    How can I prevent virtialmin to create duplication of directories? any help appreciated.

Thanks,