Adelle - You are correct, you should not be asked for a credit card if your ArtWanted credit covers the costs of what you are buying. While you card would not be charged any amount, we do agree that this can be annoying and we will give this task over to our developers to review and fix in the near future for you.
I keep trying to buy three items but they are not going through even though I have money in my bank account here on site to cover....I am buying the whole order with credit.. so cant figure out why it is not going through.