brokenjirx, I don't know why B's are being added into your name.
What I would recommend doing, is uninstalling Messenger Plus! Live and Windows Live Messenger, delete the folders in Program Files, then download and install again.
If the problem persists, try typing
code:
/nick ·$14» ·$1·#teKno·$14·# «
in a conversation.
Also, you could use BBCode, like this:
code:
[c=14]»[c=1][b]teKno[/b][/c]«[/c]