It sounds like a blemished factory second. Like many companies, Lyman sells what they call factory "reconditioned muzzleloaders".
And if this isn't a factory reconditioned muzzle loader then maybe it will become one after you contact Lyman.
http://www.lymanproducts.com/lyman/specials/
Reconditioned Muzzleloaders
These muzzleloaders have been factory reconditioned. The stocks and/or barrels have slight blemishes to the finish and we are unable to sell them as first quality merchandise. These are available only on an "as is" basis while supplies last. Limited quantities available. Should the model you requested not be available, we will contact you promptly.
http://www.lymanproducts.com/store/page191.html