The SF store is the pits. I've been a long-time and loyal customer, but I've heard that if you don't know an SA and if you don't know how to "work" them you'll find that they aren't very friendly. They like their usual customers but newbies may have a hard time. Every now and then, however, when the stars align correctly, one of them may actually crack a smile.
Then that explains it! I am a newbie and don't have a regular SA.