Calabrese only mentioned 1983 and 1988. I don't think there necessarily was no ceremony between 1988 and 1995, just none that Nick knew about. The only reason he knew about the 1988 one was because Jimmy DiForti got made then and he was from Nick's crew.
Yep. And we know from FBI files that a lot of times the soldiers were kept insulated from a lot of the important information that only people at the top knew ( I can only assume as a way to keep people at the top safe from anyone who may flip). Calabrese didn't even know some of the guys being made with him.
