Thanks for the observation. Yes, you are correct. On this site also, we currently do not have the facility to cite the individual days of run - only the start and the end day. We shall put it on the pending features queue.
In the interim, when you go to the "Seats & Fares" tab, it will show you an availability status of "cancelled" on the intermediate days when the train does not run. This is the indirect way of ascertaining if the train actually runs on a particular day.