Unfortunately I just learned about this after losing 2 protector cases and the 3 AK Mags + other items that were in them. I had an attachable pouch that I had in my rucksack (10 slots for 8 places), 3 protector cases and a first aid kit (and other bits). When I logged in 2 of my cases had gone. I looked around and found people saying that you have to stack your bag right as it can run out of space when loading in and delete them.
Just thought I'd mention this as it sucks balls, and if we are going for reality would you really throw everything in to your bag randomly and leave anything that doesn't fit? Or would you pack it properly knowing everything fitted in previously?