"If you see that your opponent has been able to move a piece back to a square that it came from in the previous move, then write to us. We will back the game up and ask that your opponent make a different move." The above is stated in the rules at the other site mentioned about the movement bug.
(скрий) Когато местите в някоя игра, можете да изберете какво да се зареди след това, като изберете съответното от списъка до бутона за местене. (pauloaguia) (покажи всички подсказки)