Regarding the cadaver dog hit...
I am not a dog handler and know nothing of the ins and outs of how they work. But I'm gonna just throw this out there.
Logically speaking, if I were handling an HRD dog and we were in a bedroom and the dog hit on an area near the floor by the bed (which I believe is the actual wording or very close to it), and where the dog hit was a comforter or article of clothing that was laying on carpet, I would want to figure out what exactly the dog was hitting on. Again, thinking logically, I would take that article (comforter, piece of clothing, etc) and move it to another area of the room and then ask my dog to examine the area again. If the dog then hit on the article (comforter, clothing, etc, laying in a new location) but did NOT hit on the carpet where it had been previously, I would conclude that there was no reason to take the carpet and would only take the article.
Again, MOO, but this is how my logical mind works.