From the official United States Mint website:
It has come to the attention of the United States Mint that the Shawnee Nation United Remnant Band of Ohio, one of the organizations whose artisans produced pouches for the 2004 United States Mint Lewis and Clark Coin and Pouch Set, is not officially recognized as an Indian tribe by state or Federal authorities. Accordingly, we are informing members of the public who own a set containing a pouch produced by the Shawnee Nation United Remnant Band of Ohio that the pouch is not an authentic American "Indian" arts and crafts product.
Pursuant to the Indian Arts and Crafts Act of 1990 (P.L. 101-644), a product is an authentic American Indian creation only if crafted by a member of a federally or state recognized Indian tribe, or an individual certified as an Indian artisan by an Indian tribe. (See http://www.doi.gov/iacb/ for more information on the Indian Arts and Crafts Act). Because the pouches created by artisans from the Shawnee Nation United Remnant Band of Ohio do not meet these criteria, they do not qualify to be marketed as authentic American “Indian” merchandise.
To make a long story short, you can get your money back if you want.