Today I went through the Mad Memoires chain to get the backpacks but I'm stuck on the last step: Mad Memorial.
I've done everything except for "Mad Memoires XVI: Hallowed Eves", this first requires the "Pumpkin Carving" achievement to unlock the dialogue (got that, was missing 20ish). The dialogue shows, and clicking the end-option "Thanks. I'll make a record of your story." with Veteran Brigadier General Kernel does not complete the achievement for me. Repeatedly tried. Walked out of distance to reset the dialogue options didn't work. Restarting the game didn't work. Anet, help?