Wrong fixation caused huge loss to govt exchequer ?

DG, AIR has written to the Prasar Bharati Secretariat about the huge  loss to the govt exchequer due to wrong fixation of salary and other payments  at the time of grant of 6th Pay Commission by the various AIR/DD stations. PB Secretariat , in a circular  to stations, has asked for re-fixation of pay/ recovery of excess amount from Gratuity from the officials. It is said that the loss is reportedly in crores. Payment of sixth pay commission was made in 2009. It took about a decade to find out the fault and alleged bungling.