Bursting control file pick up a previous variable value. how to solve it?

Summary

bursting control file pick up the previous variable value from xml output

Content

I am in EBS 11.5.10.2  using BI publisher 5.  I have a very strange problem. I will upload the bursting control file and XML Output.   I have a  print invoice concurrent program ( in xml output ) it can have multi-invoice and each invoice either email or print.  In the xml output, it have few variable P_S_DELIVERYMETHOD ( either EMAIL or PRINT ), P_S_COPIES ( if PRINT, it has 1 or zero, depend on user decision..  if EMAIL, NULL ), P_S_VALUE { if PRINT, it is the printer name , if EMAIL, it is the email to address }