The golden I used to have did similar things w/her ears/eyes when I approached w/a leash. It was a habit formed from years of me sliding a new collar on with the leash attached. She'd squint and pull her ears back in anticipation of the collar being slid over her head.
Amazing story, what a loyal, sad dog to gather the belongings and sleep with them. And an incredible job of detective work to find the family. Thanks for sharing this touching tale.