I think I'm beginning to see what the camera did ... It looks like it shot one picture at -1 EV. It then shot the next picture (whatever and whenever that was) at 0 EV. Then it shot the next picture (whatever and whenever that was) at 1 EV. Then it repeated this cycle.
So if I shot a bird, a tree 15 seconds later and a car 30 seconds later, instead of getting three copies of the bird, three copies of the tree and three copies of the car, I instead got an underexposed bird, a decently exposed tree and an overexposed car.
?