Wow... I really hate to keep harping, and you're not going to like what I've got to say here.
The locations you've used to tie down the bike are NOT ideal.
First... those seat handles are not made to handle any real stress. They are what they are... grab handles for a passenger. Not an anchor point for tie-downs.
Second... the front & rear crash bars are not engineered for lateral stress. They were engineered to absorb direct impact force only... not sustained lateral load. They may work like that a few times, but don't be surprised to find that you've broken one when you arrive at your destination.
The correct tie-down locations for a Goldwing are around the lower triple-tree in front. And for the rear, around the frame with the side covers removed.
Here's a link with photos:
TYING DOWN A GL 1500 OR GL 1800