Cocos2D: openGL-es becoming transparent over UIView - opengl-es

Question

For reasons outside the capabilities of Cocos2D, I needed to make it transparent and show UIView's behind it.
This works fine except under a certain circumstance. When a sprite's opacity becomes more transparent, it makes everything else in Cocos2D drawn under it become transparent for some reason which makes my UIViews show through.
Shown here on the first image is water tiles, drawn in Cocos2D with a UIView of the mountain and the sky showing under it. The second image is the same thing except in Cocos2D there's a black sprite covering the whole screen at half opacity, which for some reason, makes the UIView under it show through. Where this is most visible in my example is the mountain showing through the water tiles.
My delegate's applicationDidFinishLaunching code is as follows:
- (void) applicationDidFinishLaunching:(UIApplication*)application
{
// Init the window
window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Try to use CADisplayLink director
// if it fails (SDK < 3.1) use the default director
if( ! [CCDirector setDirectorType:kCCDirectorTypeDisplayLink] )
[CCDirector setDirectorType:kCCDirectorTypeDefault];
CCDirector *director = [CCDirector sharedDirector];
// Init the View Controller
viewController = [[RootViewController alloc] initWithNibName:nil bundle:nil];
viewController.wantsFullScreenLayout = YES;
EAGLView *glView = [EAGLView viewWithFrame:[window bounds]
pixelFormat:kEAGLColorFormatRGBA8 // kEAGLColorFormatRGBA8, kEAGLColorFormatRGB565
depthFormat:0 // GL_DEPTH_COMPONENT16_OES
];
// attach the openglView to the director
[director setOpenGLView:glView];
glView.opaque = NO;
#if GAME_AUTOROTATION == kGameAutorotationUIViewController
[director setDeviceOrientation:kCCDeviceOrientationPortrait];
#else
[director setDeviceOrientation:kCCDeviceOrientationLandscapeLeft];
#endif
[director setAnimationInterval:1.0/60];
[director setDisplayFPS:YES];
//color/gradient BG
bgLayer = [ColorBGView createGradientWithName:#"darkCave"];
CGRect screenRect = [[UIScreen mainScreen] bounds];
CGFloat screenWidth = screenRect.size.width;
CGFloat screenHeight = screenRect.size.height;
bgLayer.frame = CGRectMake(0, 0, screenHeight, screenWidth);
[viewController.view.layer insertSublayer:bgLayer atIndex:0];
// add custom parallax view
parallaxView = [[ParallaxView alloc] init];
parallaxView.frame = CGRectMake(0, 0, 1024, 768);
[viewController.view insertSubview:parallaxView atIndex:1];
[parallaxView release];
// make the OpenGLView a child of the view controller
[viewController.view insertSubview:glView atIndex:2];
viewController.view.opaque = YES;
viewController.view.backgroundColor = [UIColor blackColor];
// make the View Controllers childs of the main window
window.rootViewController = viewController;
foregroundLabelView = [[ForegroundLabelView alloc] init];
foregroundLabelView.frame = CGRectMake(0, 0, 1024, 768);
[viewController.view insertSubview:foregroundLabelView atIndex:3];
foregroundLabelView.hidden = YES;
[foregroundLabelView release];
[window makeKeyAndVisible];
// Default texture format for PNG/BMP/TIFF/JPEG/GIF images
// It can be RGBA8888, RGBA4444, RGB5_A1, RGB565
// You can change anytime.
[CCTexture2D setDefaultAlphaPixelFormat:kTexture2DPixelFormat_RGBA8888]; //
[glView setMultipleTouchEnabled:YES];
// Removes the startup flicker
[self removeStartupFlicker];
// Run the intro Scene
[[CCDirector sharedDirector] runWithScene: [BlankScene scene]];
}
Please let me know if you need anything else. Thank you.