The sign at the Target parking lot on Sundays states, PLEASE NO FARMERS’ MARKET PARKING. And sure enough, here is a chalk marker (albeit on a different day) marking cars on the Target parking lot:
Looks like they’re cracking down. I would make sure you leave within the allotted time, I believe 2 hours. I don’t see what the problem is, parking is in short supply in that farmer’s market location, and it will bring more business and good will to Target as plenty of people will head to Target afterwards.