You’re getting $7.15 of the list price, which is 47.66% of the list price. However, you’re getting 65% of the item price, which is correct based on somebody who was getting 52% previously.
The reason you’re getting 47.66 percent now rather than 52% is due to author driven pricing…
As for your tax, you’re getting 10% withheld. That means you’ve filled in a W8 with the relevant tax ID. If you hadn’t, then you’d be getting 30% withheld instead.