Welcome Adeline,
The MSCs need shoppers who have particular a bank, car, health insurance company, mortgage company, type of furnace or flooring or (fill in the blank) to assign certain shop assignments to the right shopper. There is nothing unusual about a legitimate MSC asking such questions.
To be sure that you are dealing with a legitimate MSC, check the list at the blue link (Official List) at the bottom of the page and compare the web address with the one that you were using to sign up.
Based in MD, near DC
Shopping from the Carolinas to New York
Have video cam; will travel
Poor customer service? Don't get mad; get video.