Scrum back from where the ball was kicked

When a player kicks the ball from deep infield over the opponents dead ball line, it is a scrum to the opposition back where the ball was kicked. Instead of that you've got a 22 drop out. This means that in one of my games I was doing a 22 metre drop out, and the opposition were just kicking the ball over the dead ball line, then I did the 22 drop out, then they kicked it over the dead ball line, and so on, and so on. It really should be a scrum back. It just spoils the game otherwise