wow...i thought this was an isolated thing that happened to me last year when i went to buy a MBAir.
I had already scouted all the versions and knew exactly the one i wanted so when i walked into the store i just said i want the Macbook Air ...with such and such. They guy then starts asking me stuff like "who is it for?", "what are they going to use it for?", "does that person currently own bla bla bla?" ...ultimately i got pissed and asked the guy if there was some reason why i wasnt allowed to just buy the one i was asking for and if i needed to fill some sort of requirement in order for him to allow me to pay him for the computer? then the guy got angry and told me that he considered himself a "salesman" and if he just sells me the machine then he is nothing but a clerk.
ultimately i ended up getting the one i wanted because if was a gift a buddy had asked me to get for his dad but geez i almost turned around and just walked out of there empty handed.
maybe that guy came from Best Buy to work for Apple. Sometimes it takes time to wash that off.