Yukia Tsunenaga

So a while ago (a couple of weeks), I notice that a number of items are missing from my inventory, specifically from folders that contain other items I use a lot. All the items from those folders that I don't use all that much have completely gone, and some of them are items that I've bought (or took a while to assemble as one would in The Wastelands). This has happened a while ago, actually, but I immediately logged off thinking it was a temporary bug. What's going on?