1) YPR-KCG ARP Availability is 100 and KCG-NZM is 50. Assuming these 50 berths are not a part of the former 100 berths, these 100 berths cannot go vacant from KCG and hence would be used to confirm waitlisted/rac tickets during charting.
2) Same number as mentioned above. Assuming these 50 berths are a part of the former 100 berths, remaining (100-50) berths has to be used ex-KCG and hence would be used during charting as mentioned above.
3) YPR-KCG and KCG-NZM ARP Availability is both 50; i.e. berths used for YPR-KCG is...
more... forwarded for reservation for KCG-NZM and hence no berths in this case would be forwarded meaning confirmation of WL/RAC Tickets becomes tough in this case.
All the numbers mentioned above are just mere assumption. This is just to let you know that there are various tweaks in the reservation system and unless and until you are aware of it you would not know the same.
Try searching for ARP Avaialbility status for this train between 00:30 - 08:30 hours and analyse them carefully.
Thanks.