Suppose two pods are stacked in a square, and I jump them. For purposes of playing Octi on-line or competing in the upcoming Robot tournament, you must remove both. The reason has to do with the awkwardness of the notation associated with single-piece captures. When playing in other venues, you may capture just one. The dark colored pieces move first.
Draws are extremely rare.
As far as I know, no one has encountered on in an actual game. But it is theoretically possible. Any 3-time repetition of moves by both players will be declared a draw.