That's good to know Betty. I have taught a few people to use the ones at Costco and Walgreen's without any problem. I am sure the software is different as are the machines and the users of the machines as well justas each camera works differently.
I do think they are easier than teaching someone how to upload their photos and connecting a camera to the computer at home - so many computers use different software and interfaces.
Even my mother had trouble loading the film into her Kodak Brownie back when. She had to buy her film at the photo shop so they would load it. Digital cameras are no different. All new skills and each camera has it's own operation.