This sounds like the bootleg shirts they've been selling outside the venues. I do recall seeing a black shirt with the tour dates listed on the back, without band pics. Also, the CAA & Philly shows had the Fugehdaboudit (like the Sopranos)shirts with the actual date of the show listed on the back. Make sure you take enough money, they aren't cheap. Head over to the "official fan club" site, merchandise section if you want an idea what's for sale.
Hope that helps.