Ahh. I got sidetracked I guess and was wondering how far (mm, inches, yards, kilometers) past infinity "past infinity" was.
Like you said earlier... I've never seen nor heard of a Nikkor that didn't stop at the infinity index mark. Something wrong with that lens probably. If the infinity index is offset, I wonder if the others are equally offset.
Or if it's the OPs only lens and there's a problem with the camera body. No one else seems to have picked up on that, and the OP hasn't answered.