Heya,
I'm not really sure, but as far as I know Microsoft moved MSN to skype. So I think that in the contact information at the profile, it should say "skype" instead of "msn". I'm not familiar how the merging works, cause I have been using skype instead of msn for a long time now, so I don't know anything about that, but I think adding skype to the contact info would be a good idea.
Regards,
Zeero