The zonal system creates all these issues.Since every zone has their set of trains plying to different zones, they would want to treat their own trains on better level than the other zonal trains.A very simple example is that if a certain train of NR zone is coming to NDLS along with trains of other zones, the NR zone will be given preference over other zonal trains, and will be given entry over the other zonal trains. Similar is the case with the maintanence of trains, hence it doesn't shock us too much when we hear these issues.The only and prime concern is people like us as pasengers who travel in the trains and because of the tussle between the zonal railways such negligence is bound to happen and we as passengers have to face it.