Multiple Office Live Account Login

I am confused as to why on certain computers while using multiple login for different accounts using Office Live, all the accounts I use to log into Office Live show up on the sign in page while on another computer when I sign into an account, the other goes away and is replaced with the new login. Any suggestions here? I am using two XP pro computers and one Vista Ultimate. One XP pro keeps all logins and on another XP Pro only keeps one account at a time. The Vista computer also shows only one login and is always being replaced by the newly typed in account. Help?

[579 byte] By [AndTodo2] at [2008-2-7]