No. It wasn't sniping loot in any case. All the creatures hadn't even been spawned in. Sniping the 2 bloated ones in the final room would cause all the other ghouls there to spawn in. These would actually only spawn when we, the party, came through. It was also several occasions that it happened. 3 of my own ventures, and many from others. Think it was just a bug that seems to have fixed itself. Like the container idea tho