Me and a friend went from Sheffield to Derby yesterday evening (Sunday) and bought our tickets from one of the East Midland TVMs at Sheffield station. Anyway fast forward to today (Bank Holiday Monday) and we get to the barriers at Derby station. I get through OK but my friend gets stopped, if turns out he has managed to purchase a Sheffield to Derby anytime day return rather than an open return. I find this odd as £20.90 was what he paid which I mentally had in my head as what I had selected before applying my railcard discount so when we got back to Sheffield we actually went back to the same machines and went through the same steps. As it turned out the anytime day return was the option directly above the open off peak return at £20.70 so I could suddenly see exactly where the confusion occurred! I've advised he gets in touch with EMT regarding the matter as regardless of human error, surely the machine shouldn't be offering to sell anytime day returns on a Sunday when all day is off peak regardless? I thought he was just being stupid at first but I saw exactly what he meant going back to the machine!