It does still go through PayPal, but instead of just saying "PayPal" it attaches the seller account who you paid. This is so you have more information for your accounting or in case you have a dispute. If they all showed up as just PayPal on the bank statement it would be a lot harder to keep track of things. The seller still gets none of your information. Just like when you pay with a card at a store, it doesn't just say "Mastercard" or "Visa" even though that's the payment processor, it lists the store you used it at.
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