Units are unequivocally the cpu dies, and typos are definitely not defects. Good catch.
While the chip itself is not defective, the CPUs are.
When you pay for a CPU, you're buying the whole thing, including the box, packaging, CPU package, die, etc, thus if the IHS is incorrectly marked, the CPU would be defined as defective from a manufacturing perspective.
It was supposed to meet some spec defined by AMD, including not only the specific nomenclature included on the IHS, but also the placement of the information. You personally may not care, but as a company manufacturing a product that likely wants something high quality, they do care, and thus the part as a whole is considered defective.
Reference: I work in the electronics industry as a Quality Engineer, and I've been part of this industry for the past 9 years.