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I didnt really get what you wanted to say, but from what info you have provided, I can analyze, conclude and summarize as below (I am applying my analysis also) for Godan Exp:
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Tickets from LTT to ALD given from PQ + GN in this order. If no berths vacant, then passenger is placed under PQWL.
Tickets...
more... from LTT to GKP given from GN + PQ in this order. If no berths vacant, then passenger is placed in GNWL.
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It can happen at charting that GN quota has berths vacant. In this case the system starts to clear passengers under PQWL as well.