Its not about the station size, its about the name of the quota. The quota is called like that, thats not my fault. May be IR didnt find a good name for it.
Assume when a quota is defined from Mumbai to Solapur, its NOT "Mumbai RS quota", it is "SOLAPUR RS quota".
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Note :
RS...
more... quotas are identified as to where they end
RL quotas are identified as to from where they start
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Again, I have not named these quotas. Its a system nomenclature applicable to all trains and all stations over Indian Railways. Had I designed this system, I would have defined something better.