Deflect on a Shield

[Stripe]

At first, it seemed to me that DFRPG added some much-needed clarification to Deflect in that it now only counts toward the location of the armor it protects. See Magic Items pp. 4-5.

However, I then noticed Deflect can still be placed on shields. Perhaps it only defends against attacks to the shield, which would be fine with me, but DFRPG doesn't use DR/HP for shields (which I actually miss) that I noticed, so I don't think that's the case.

Defending Shield costs $10,000 to add +1 to block and +2 for $20,000.

Does Deflect on a shield add +1 to all defenses to any location for $2,000 and +2 for $10,000?

I understand that Defending Shield can probably stack with Deflect to allow a really high block score, but is that the only reason for doubling a much higher cost with a lower usefulness? Or am I missing something or reading something wrong?

Thanks!