Help Adding Contacts on Windows Live Messenger

Anyone, please help me out. It’s been almost a month now since my Windows Live Messenger had started acting up. I have a list of friends on my personal account which seem to appear in the office messenger that I have. I swear I did not add these. I even have some people on my account that I don’t even know.
I need your help! I want to add a number of people on my work messenger account, but they don’t seem to receive the invite. Need your insight on this.
Thanks…
Alex Garcia
