What you are seeing is the authorization of funds for your credit card. When you place an order with a credit card, the system needs to check that the funds are available before it releases the order. It also authorizes for an amount that is 10% higher than the total in case there are taxes that will need to be charged.
Sometimes this authorization shows up on your account. How long it stays there is up to your credit card company. It can be anywhere from 1-2 weeks.
This authorization will go away in a short time and be replaced by the actual charge when you order ships. If your order ships quickly, you may still see both on your statement until the authorization disappears.