As explained by Mr. Amit, as it existed Bi-weekly with a day @ JSME & other @ MDP!!
Its nt a stupid practice, as looking out for stoppage demand & hence reduction in average speed of many trains (which eventually yield less slack & increase probability of OT, especially in Bihar), this fundamental will get very useful by keeping demand fulfilled along with stop been shared at different days!!
Look at stoppage of Magadh/Shramjeevi/Vikramshila/Maurya......thy stop @ approximately many stations, which dnt hav any impact on its revenue, but are prone to get undue...
more... OT & derailed schedules!! If on different days, buckets of stop get created & shared bi/tri-weekly for same train..it certainly ease the stoppage load for each them, without any revenue impact along with political demand address!!