If you have neverlost checked as a preference, then they will charge you for it each and everytime. I took it off my preference because I was getting it with the car class most of the time.
Just take it off and I think all will be ok. I rent cars all the time via the SAN area and they don't charge me for the NL at all. They did when I had it in my profile.
SAN is one of the better locations for getting upgrades and nice cars. I rent alot from them, either via the local edition or just from the airport. Great people at the gold booth and they will work with you as best they can.