wah lao!
this is damn troublesome lor.
i took my napfa in june.
napfa expires after a year. now i'm in PTP batch enlisting on
the 12th of Sept.
super shitty man 
if i in the june/july intake i should be in july lor 
u can retake ur napfa now right? call cmpb and tell them this..
u have a chance to serve 2 months lesser don't waste it.