What’s amiss with the image? I’m not able to follow what you see as an issue.
Should both gears have their own outline instead being outlined as if they were merged first? That would mainly be a matter of adding the effect to the objects individually instead of the layer.
Otherwise I’m not sure what you’re describing.
Sorry, I was away for a bit, the issue with the first image before the game was maximized can be found in the top right of the image, the issue with the other one can be found in the bottom right, when the game was maximized. It's like outlining the sprite as an object instead of just the image, and it changes depending on if it's full screen or not. (You might be confused because of the background image, but even then they look out of place, I can get some more images if you'd like)