i hope that's just a lack of proper communication on the viet side.
if the pilots are to be reprimanded (and i DISAGREE with the salary penalty), it could be because of airmanship issues:
the hill is 9 miles to the threshold, ideally you should be 2700' over it, and their 2642' is just 58ft low. no big deal here.
however, what could have actually triggerred the alert was their rate of descent. 1520fpm sink rate was too much to maintain a 3deg flt path at 238kts.
that was what was probably being highlighted, albeit in the WRONG MANNER. everybody commits mistakes, and punishment by salary cut does not a better pilot make.