Mathematical alignment vs. optical alignment…
The original is centred to container (the logo is equidistant from each side).
You appear to be visually centering based on the midpoint of the body of the roo…which is why the tail extends off the guernsey front, and there’s a random empty space...
It’s a long shot - but does anyone know where these were originally posted? Only have it saved as low-res…tried a reverse image search and coming up with nothing.