Items Missing From bag?
Scratch that. 100 point chest at first, then I got a 500 point chest. Still worried about the handful of items disappearing, though! Any insight would be appreciated.
Did you ‘Deposit All Collectibles’?
The achievement chests seems to mix PVE, WVW and SPVP items, so some of them will end up in your SPVP wardrobe/locker rather than your PVE bank.
There was a glory booster in the 100 point chest, and the 500 point chest contained another chest with SPVP gear (along with badges of honor and a siege blueprint).