its called a hold charge.. every transaction does this. they will hold $1 to make sure account is active and vaild. Some places check for amount. Paypal hold the $1 for the transaction. They will return this $1 or holding amount until the transaction is complete.
you will get that money back, they are checking the card to make sure that it is yours and see if the card is ok they will give the money back in a few days.
paypal是跟你借一块美金,不然他们怎样生存?