Pre-cancels? Overprint? Surcharges? Inflation?

Please help me understand.
The dots p.w. n. Y. Is a pair pre cancel Correct?Pre-cancels less valuable (ussually)
The green n.y. n.y. is also a Pre cancel. Correct?
Playing card is a over print?
The yellow stamp is a. Surcharge?
Stock transfer is also a cancel?

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