I think SA refers to any saleslady/man who can help you make a purchase at a particular store at a specific time, whereas a personal shopper is someone whom you either PAY to spend X amount of time with you and during this time he/she advises you on what to wear OR if this personal shopper works for a luxury house/boutique (eg. Holt Renfrew), the company pays/hires the personal shopper to shop with you, but you must spend Y dollars on your purchases
Sounds like she has a little side business, unless it is an LV business card, otherwise I think CEC hit the nail on the head. Personal shoppers are the best, they will pull racks of clothes[ or housewares, access,whatever you are in the market for] for you & all you have to do is drink the champagne & eat the nummies while trying on the gorgeous clothes in a private setting. PSers are the best!!!