Yes, you are right. It's all about Priority Ration card defined in NFSA and well explained in the main article. But in your first query, your card belongs to non-priority as per NFSA but granted as State Priority Ration Card.
State priority is given to an applicant who has no eligibility for holding priority ration card as per NFSA but special consideration based on State's discretion that varies State to State.
Eligibility for Holding State Priority Ration Card In Kerala
NFSA Non-Priority but any member with chronically ill will be getting State Priority ration card.
NFSA Non-priority card holder can have car at any point of time.
I hope you are clear now. If I'm wrong, welcome to correct me.