I think there has been some form of recent change to various badge regs that allows PJIs (and former PJIs) who have served with 5 AB or 16 AA to wear the para wings as well as the brevet. My former OC PMS (ex-PJI) turned up one day with new wings on his arm and tried to explain it. Something akin to the previously mentioned difference between serving with an Airborne unit or not.
Or he might have been BS'ing me.