PayPal PayPal's supposed buyer protection Internet

On 20-06-2012 I placed on online order with a Hong Kong company, and authorized a PayPal Payment.
23-06 I received a message that the payment was rejected (not enough funds, as it turned out).
23-06 to cut corners, I logged into my PayPal account and made the payment "manually"
30-06 K.O Gadget Store confirmed that they received my payment.
16-07 I got shipping confirmation from K.O Gadget Store
26-07 K.O Gadget Store used my authorization from 20-06 and... charged my AGAIN.

I wrote to them, twice, no response, so - believing in PayPal's buyer protection assurances - I contacted them about it. There were two options to choose from: "goods not received" and "unauthorized account access".

Had I opted for the first, I probably would have gotten my money back, but I opted for the second. PayPal responded very promptly indeed: we investigated, and there was no unauthorized account access. Which _formally_ is correct, but they could see all the history, the same order number in both payments, yet what did they choose to protect? Their transaction fee, it seems to me.