Now that I think about it, I'm wondering if you've been activated as a field agent. TrendSource tends to limit the number of shoppers they have in an area. You can apply to be a field agent, but if there aren't any available assignments they won't activate you immediately. When they need a new agent in the area, they'll email you project offers. When your first request is approved, you'll get an email saying you've been engaged as a contractor.
Until then, you're in the system as an applicant. I have a few emails from back when I was an applicant that only show pay ranges, not the exact amounts for contractor pay and reimbursements, which makes sense because applicants can't complete the ICA until after they're activated.
In my experience, the amount paid for the shops has been on the higher end of the scale, but I'd assume the lower when applying for a shop if a range is given. Regardless, when you're approved, you should have the opportunity to review the details before accepting/declining the project.