Well, i think i messed up on one of my codes. It doesn't remove a person from the list that leaves. Here is the code:
Private Sub Event_Leave(strUser, strFlag)
   'User leaves current channel
   'strUser: User's Name
   'strFlag: User's Status Flag
   frmBot.ChannelUsers.ListItems.Remove (frmBot.ChannelUsers.FindItem(strUser).Index)
End Sub

if you display them by there name, then i see nothing wrong with that..