Contacts merging problem in windows live mail and hotmail server

I am using windows live mail (windows essential) software. Every time I install it, there is regular problem with contact list. It shows all the contacts from outlook, facebook, linkedin and skype separately which ends up more than 1800. When tried clean up option, it opens hotmail server contact list in explorer where they are already merged and only show around 800+ contacts in the list. How can I have same list in WLM on my system without showing separate list or groups.