Issues with adding an array of sprites to the screen in cocos2d?

Question

for my game in cocos2d, I'm trying to add an array of sprites to the screen that constantly move to the left. When I add the method to my update method, it doesn't work as expected. I first set up a batch node.

- (void)setupBatchNode
{
    _batchNode = [CCSpriteBatchNode batchNodeWithFile:@"berries-hd.pvr.ccz"]; 
    [self addChild:_batchNode z:-1];
    [[CCSpriteFrameCache sharedSpriteFrameCache]
     addSpriteFramesWithFile:@"berries-hd.plist"];
}

-(void)updatePinkBerries:(ccTime)dt
{
    CGSize winSize = [CCDirector sharedDirector].winSize; // Is it time to spawn a pink berry?

    double curTime = CACurrentMediaTime();

    if (curTime > _nextPinkBerrySpawn)
    {
        // Figure out the next time to spawn an asteroid
        float randSecs = randomValueBetween(0.20, 1.0); _nextPinkBerrySpawn = randSecs + curTime;

        // Figure out a random Y value to spawn at
        float randY = randomValueBetween(0.0, winSize.height);

        // Figure out a random amount of time to move from right to left
        float randDuration = randomValueBetween(2.0, 10.0);

        // Create a new berry sprite
        CCSprite *pinkBerry = [CCSprite spriteWithSpriteFrameName:@"testt.png"]; 
        [_batchNode addChild:pinkBerry];

        // Set its position to be offscreen to the right
        pinkBerry.position = ccp(winSize.width + pinkBerry.contentSize.width/2, randY);

        // Move it offscreen to the left, and when it's done, call removeNode
        [pinkBerry runAction:
         [CCSequence actions:
          [CCMoveBy actionWithDuration:randDuration position:ccp(-winSize.width- pinkBerry.contentSize.width, 0)],
          [CCCallFuncN actionWithTarget:self selector:@selector(removeNode:)], nil]];
    }
}