I don't think that's normal. Are you sure the box was unopened? I'd check the shutter count at least
It's clear that the box had been opened and repacked. The first thing I did was check the shutter count, and it is only six. I had already taken a couple of shots myself.
The battery in the camera has a sticker from the camera shop on it, so I'm sure including it was an error on their part. I sent them a note offering to return this spare battery if they want to pay shipping.