I think there is a bug in Cannibal Dugout. I could not find all twisted horns to open last chest that needs 5 twisted horns. I was short of 2 twisted horns that I couldn't find in the cave so I came outside of the cave to find them. Luckily I found one but every time when I pick it up flashing light goes on. I then come to world map and then again enter in Cannibal Dugout the twisted horn that I pick up shows at the same place and I am again short of 2 twisted horns. Please help.