Sorry to hear that fellow DC bro, Fortunately i got my plat so basically as long as you click out and potentially go into a new map it saves, apparently. I too lost my charisma/Stam on my Gold Armour X i pretty much won before it kicked me off, which was the map right after i got my last plat.
Got all the things, just only once, no copies. Unless you mean silvers and such, in which case i have too many. Please don't send more.
Like I said, I got to the reward screen but then it gave me the error message, which lead to another message... but apparently if you can exit the reward screen it counts?
Personal favorites, by game:
Millennium War Aigis (RIP): Liana
Girls Kingdom (RIP): Iris
Dragon Tactics: Memories (RIP): Diske
Brave Girl Ravens xR (RIP): Francette
...Most of the games I play on Nutaku end up getting taken down. Hmm.