This is a big problem with debit cards. The STORE where you used it last probably put a hold of double what you spent until they were paid. They are supposed to drop it within 24 hours but usually don't. Convenience stores where they sell gas are the worst for this!

There has been a big flack where I live (Montana) because we get a lot of tourists driving long distances and suddenly find themselves stranded in a small town with no money and no gas. I think it should be illegal to put a hold on more than the amount but I don't own any Congressmen so what does my opinion matter?