The reason that you are getting poor shop results is not just that you are using Craig's List. You are also paying way below what a well trained and experienced shopper would ask for the type of compliance shop that you need. I saw your form and it requires some role playing, which other mystery shops in the price range do not. You are comparing apples to oranges when you state that you pay more than similar shops.
I got your PM and have called and left a message for you. I look forward to talking about this further. May I suggest that you add your name to your sig line, since you are clearly representing a client, rather than just being a shopper.
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.