I love that your dog has learned to run the machine! Would've been GREAT on YouTube!!!
My dog (she was a lab/shepherd mix, about 65 lbs) also had a problem - sometimes - walking on the kitchen floor. If she DIDN'T think about it & just walked thru', no problem. But every once in a while she would overthink it & as soon as she hit the linoleum, she'd go up onto nails & try to TIP TOE across it, and of course would slip & slide the whole way!
One other funny - if I told her to put her toys back in their basket, she would do it, but curse & grumble the whole time! lol