It stop both time at RU . 6351 while coming at RU stop only for 2 minutes as it does not need to reverse loco while coming from GTL side but when it comes second time to RU from TPTY side it need to change loco towards AJJ. As no train schedule will take duplicate station name again the train schedule show one time only. There are so many examples where the trains comes two times and it will be shown only one time in timetable .