I went down this road with Avis recently trying to use the USAA rate. Apparently Avis has done something to the system that requires you to change your default AWD number in order to get the preferred benefits and credit for the rental. I think it's intended to keep you from easily shopping rates, but it's a real pain.

Yes, I know that there are some Wizard numbers that are locked to certain AWD numbers (where the Wizard number is provided by your company, for example, and locked to your company's AWD).

I had a conversation with Avis about this, and the upshot was that I could change the default AWD and everything would work just fine. And it has, so far.