Why is my msn like this?

[Smith]

someone went on the computer before me one day last week (my mum or my sister) and fucked my msn. Now its not showing there screen names,just emails.

How do I fix this?

[Virtualbody1234]

Now its not showing there screen names,just emails.

How do I fix this?
There where?

[tesco]

Click contacts ->view contacts by -> display name