Recently, looking in the WLM Contacts, I found over 40 phone numbers (no any other info) under the name "Network". These numbers are not known to me and they could not be deleted from Contacts. They could not be deleted from Hotmail/Outlook web page either. The message said that they are the Skype numbers and could not be deleted from Outlook page. However, on Skype these numbers are not listed (at least I was unable to find them).

How to get rid of these numbers? How to prevent them from appearing in the WLM Contacts?