ScrollLayer always bounces back when content height is less than winSize height

[hactar]

Nice class, works well, but found a bug.

I'm trying to create a horizontal scrolllayer which is wider than the screen (600 points), but only 150 points high (less than the windowSize). When I do this the scrolllayer always bounces back, even though theres still content to be scrolled.

Code (this sets the height of the content to be 1 less then the winSize):

    AScrollLayer *scrollLayer = [AScrollLayer node];

    //scrollLayer.horizontalScrollDisabled = YES;
    scrollLayer.verticalScrollDisabled = YES;
    scrollLayer.contentSize = CGSizeMake(600, [[CCDirector sharedDirector] winSize].height-1);
    [self addChild:scrollLayer];
    //[scrollLayer setRelativePosition:ccp(50, 50) type:kCCBPositionTypePercent];


    CCLayerColor *colorLayer = [CCLayerColor layerWithColor:ccc4(255, 0, 0, 255) width:600 height:[[CCDirector sharedDirector] winSize].height-1];
    colorLayer.anchorPoint = CGPointZero;
    [scrollLayer.contentLayer addChild:colorLayer];

Expected result:
ScrollLayer should scroll horizontally for a bit as 200 pixels are outside the iphone4s screen

Actual result:
ScrollLayer immediately bounces back.