Two player cannonball scene, need scripting help

I created a scene that has two castles each made of up a few hundred rigidbody bricks, and a flag. Players take turns firing various cannonballs from their cannons at the other players castle, trying to hit the flag. I'm having a bit of difficulty transitioning between players after the shots.

Basically what I'm trying to do is after each shot (pressing space) have the game switch between two cameras positioned slightly off screen of each other, switch the active player, and simultaneously activate and deactivate each players castle as it switches turns.

This is what I have. It almost works but for some reason it switches the active player twice every other time the spacebar is pressed, and I can't figure out why. Any help would be appreciated.

 	if (Input.GetKeyDown(KeyCode.Space)){ 
 		// press space to shoot 
 		var ball: GameObject = null; 
 		if (cannonballType == "Heavy Cannonball") { 
 			if (numHeavy > 0){ 
 				ball = Instantiate(heavyball, shotVector, Quaternion.identity); 
 				numHeavy--; 
 				print(numHeavy + " Heavy Cannonballs remaining"); 
 			} 
 			else { 
 				print("No Heavy Cannonballs remaining"); 
 			} 
 		} 
 		else { 
 			ball = Instantiate(cannonball, shotVector, Quaternion.identity); 
 		} 
 		Debug.Log(dir); 
 		Debug.Log(activePlayer); 
 		PlayerSwitch(); 
 		ball.rigidbody.velocity = Vector3(0,angle,- power); 
 		Destroy(ball, 10); 
 		//print("Angle:" + angle + " Power:" + power); 
 	} 
 }
 
 function PlayerSwitch(){
 
 	//checks to see which player is currently active
 	if (activePlayer == "Player 1"){
 		yield WaitForSeconds (6);
 		//time delay to allow the player to watch the cannonball 
 		//play. Eventually I will add something to stop the player from firing extra
 		//cannonballs during this time
 		activePlayer = "Player 2"; //changes active player to new active player
 		Debug.Log(activePlayer);
 		dir = cannon2.transform.position.x; //sets the X vector of Vector3 to Player's
 		cannon's X vector
 		Debug.Log(dir);
 		camera1.active = false;  //deactivates Player 1's camera
 		player1.SetActiveRecursively(false); //turns off Player's castle/cannon
 		camera2.active = true; //activates Player's camera
 		player2.SetActiveRecursively(true); //turns on Player's castle/cannon
 		print(activePlayer + "p"); //Print's active player
 
 	} else { 
 		yield WaitForSeconds (6); 
 		activePlayer = "Player 1"; 
 		Debug.Log(dir); 
 		dir = cannon1.transform.position.x; 
 		Debug.Log(activePlayer); 
 		camera2.active = false; 
 		player2.SetActiveRecursively(false); 
 		camera1.active = true; 
 		player1.SetActiveRecursively(true); 
 		print(activePlayer + "p"); 
 	} 
 }