Thanks K Jeeraporn.
It couldn't be happened if the preson who responsible for checking MIB had gone thru deeper detials of each MIB case. Just put more care on the cases, it can help the team save business.
To avoid this incident happen again, I would like to set the meeting between TM support team and U/W team in order to review working process. TM team will set the invitaion to your team shortly.