Follow the bouncing ball

I have a slight issue. I want to create a ball that has a consistant bounce to it. Currently the ball uses physics and bounces correctly until I move it right or left. When I move the ball right or left, the ball sometimes loses height. I also have a freeze function where I can stop the ball from bouncing, but it too has the problem of losing height.

Is there any way return the ball to a consistant height? The following is myball code:

function playerBall::onLevelLoaded(%this, %scenegraph)
{
//set the player's ball name to the instance
$pBall = %this;
moveMap.bindCmd(keyboard, "a", "pBallLeft();", "pBallLeftStop();");
moveMap.bindCmd(keyboard, "d", "pBallRight();", "pBallRightStop();");
moveMap.bindCmd(keyboard, "space", "pBallFreeze();", "pBallFreezeStop();");
}

function playerBall::updateMovement(%this)
{
   if(%this.moveLeft)
   {
   %this.setLinearVelocityX( -$pBall.hSpeed );
   }
   if(%this.moveRight)
   {
   %this.setLinearVelocityX( $pBall.hSpeed );
   }   
   if(%this.freeze)
   {
   %this.setLinearVelocityY( 0 );
   %this.setConstantForceY( 0 );
   }      
   if(!%this.moveLeft && !%this.moveRight)
   {
   %this.setLinearVelocityX( 0 );
   }   
   if(!%this.freeze)
   {
   %this.setLinearVelocityY( 0 );
   %this.setConstantForceY( 200 );
   }
}

function pBallLeft()
{
$pBall.moveLeft = true;
$pBall.updateMovement();
}
function pBallRight()
{
$pBall.moveRight = true;
$pBall.updateMovement();
}
function pBallLeftStop()
{
$pBall.moveLeft = false;
$pBall.updateMovement();
}
function pBallRightStop()
{
$pBall.moveRight = false;
$pBall.updateMovement();
}
function pBallFreeze()
{
$pBall.freeze = true;
$pBall.updateMovement();
}
function pBallFreezeStop()
{
$pBall.freeze = false;
$pBall.updateMovement();
}