Ammi Jaan kahti thi Railfanning se bada koi dharm nhi hota or koi Railfan chhota nhi hota - Shanzil Kabir

Sorry to say once again, but all your assumptions are purely fictitious and has no resemblance with the actual Charting Process.
Further, you have not been able to elaborate your earlier statement wherein you had stated that "in between WL2 to WL12, one of the passengers might be short distanced (in some quota such as HQ or something) "
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1. Special Quota charting...
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takes place first. So there is no question of imagining a "Special/Intermediate" time for it.
2. Here WL 2 - WL 12 does not indicate that there would be no other WL 2 - WL 12 for the said train.
WL 2-WL 12 mentioned here would simply mean GNWL 2 - GNWL 12 where the GN Quota is been shared from start-end.
3. If I at all have to assume that some berth was booked for Durg-Pendra, then again its charting would have happened much before the charting for Pendra leaving sufficient time for this particular PNR to get the confirmed berth.