新手樂天網拍問題

前幾天我在樂天拍賣買了雙鞋子,
但是他寄了一封email給我說
Thank you for choosing Sugar online shop in Rakuten Ichiba.
Please refer to the information below regarding your order.

Please pay the "Total amount billed" within 4 days from this e-mail date through the following link
to our PayPal accounts
下面一排網址,還有我的資料
照理講我都有填visa的資料,為甚麼還要再叫我付款呢??
請教各位大大的幫忙!

網址進去是Pay Pal2的付款系統!