No it's not just you. I wasn't even aware of the term until somebody at work was reading from a menu of some description, and said "your latte will be served by a barista (except she pronounced it as "barrister") leading me to wonder what the hell a barrister was doing serving coffee.
I think next time I visit Starbucks, I'll just snap my fingers and shout "waiter", when I want service. Barista just sounds pretentious.