Have they actually "captured" the funds or are they only "authorized" to charge you, Chris? If they have actually captured the funds, that is tantamount to thievery.
When someone orders something from me (and this is the officially prescribed practice), all I do is "authorize" the funds in the amount of the purchase. What that amounts to is that the funds are reserved and the customer's available credit is reduced by that amount. No money has actually changed hands yet. Only when the goods are ALL shipped, are the funds "captured", which means the money is transferred.
The reason to reduce the available credit is so that the card holder can't go on a spending spree and have no money left on the card when the goods ship.
Additionally, if someone attempts to use a card for a purchase and it fails, the available credit is reduced by that amount temporarily. If they do it again, the available credit is reduced again. The reason for this is to help prevent thieves from trying randomly to use credit cards that don't belong to them. If they try to buy something for $1000 five times using wrong information and the initial credit limit on the card is $5000, the card is locked up and they are out of luck.
Tom