I've noticed on occasion some 1.46 missions that have been "updated" for 1.91, like adding the new weps and such, have an ammo bug. When you take something from the crate, the crate will disgorge many of it's contents on to the ground. Seems this may be because the crate is "overfilled"? So the main ?? is what is the crate capacity? I generally add 50 weapons and 90 mags for each weapon type.