Don't understand the wish to argue over whether it's appropriate or not to be at a job the next day or not. Depends on the circumstances - maybe the customer needs the job doing quickly - maybe the cleaner has a spare slot - maybe the customer doesn't need it doing quickly but that's the only spare slot they have. And maybe the cleaner wanted a change of scenery, I like new jobs, they break the boredom.
Too many assumptions made on here and second guessing.