I have a sister who packs like that. While my daughter was on bed rest her aunt packed for her - no labels on boxes, nothing packed by room just done willy-nilly. Daughter said it was an adventure unpacking.
Same sister did my mom's filing system - no rhyme or reason. I've worked in offices and done huge and complicated systems so I redid mom's recently.
Dad's you gotta love them. Mine had a weird sense of humor. I still want to call him when something happens that he would enjoy. He's been gone for 15 years now.