I've had a similar problem with my 06 Saturn Relay van. Only 1 costco station gives me a headache, no other gas station or other costco have given any issues. with this one particular costco, I have to hold the nozzle at the 2-3 o'clock position.
I used to pump gas back in the day, the culprit was the boot back then. but it works fine on my other cars and nobody else apparently has an issue either.
I don't get it.. but I know how to get around it!