Anyone noticed higher prices when using the contract/discount code? I was booking a car for my wife and thought I'd see if my corporate discount helped at all. It ended up pretty much doubling the cost. I then went back and found that removing the code for a reservation next week reduced the daily rate by about $30.

I'm happy to pay National a premium for service/ease, but having prices further marked up by using a company "discount" seems a bit over the top.