All I saw on the website was the note "This device includes a one-time addition of airtime to your prepaid account." You might want to contact Customer Service and ask (this is a customer-to-customer forum):
Customer Service - Prepaid
Dial *611 from your cell phone
24 hours a day, 7 days a week
Tikibart is right contact customer service at 1-888-294-6804 and they will add the $10.00, the same thing happened to me when I ordered my phone through verizon online, just call and they will add it to your balance.