Shoutbox

I got an e-mail from my ex (who I have unblocked and he is already on my contact list, even though I have blocked/deleted him several times in the past) and it was from his e-mail, but in the form of hotmail. It says -

Title:
emailaddress@hotmail.com* wants to add you to Windows Live Messenger

Add windowslive@live.com to your address book so you don't miss any invitations from your friends.
emailaddress@hotmail.com wants to be able to chat with you online

View invitation

Already have Messenger?
View the invitation online or sign in to Messenger.

Don't have Messenger yet?
1. Get Messenger - it's free!
2. Add emailaddress@hotmail.com to your contact list.
3. Start chatting

So I logged onto MSN and there was no box which (usually does) pop up to say 'blablabla@hotmail.com has added you to their contact list' and he was already on my list, but offline. Last time I knew he had blocked me. This is really confusing.

I also clicked the link on the e-mail 'View the invitation online' and it said 'Invitations' and the list was empty. Please help me with this?

*I changed the e-mail address so his details would not be shared without his permission