This train is famous for tickets ending up in Wailist.
Out of the 82 consequential CC PNRs posted on IRI only around 50% have been confirmed and the reamaining 38 ended up in Waitlist. And if you observe, most of such waitlisted PNRs have been booked from one out of the four remote locations.
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So the tip here is, if confirmed tickets are unavailable and you're risking the...
more... waitlist, ALWAYS book from KGM in GN quota and change the boarding point accordingly. Else in 9 out of 10 cases, your ticket will NOT CONFIRM.