I think that's how they handle a battery replacement when a remanufactured battery is used for warranty replacements. They use a remanufactured battery that has a similar capacity as the one being replaced. They don't replace it with a battery that would provide the original mileage/charge level. That would require the purchase of a new battery, as we've seen in other threads.Maybe you got a remanufactured pack with matched capacity.
The image above does show "capacity re-assignment".