My understanding is that if it is distilled in another state than where it is bottled, they have to put that on the label. Since it's bottled in Bardstown KY, they have to include distilled in IN on the label. So, the 15 year old label should give some clue. Either it was distilled and bottled in the same state, or list the two different states.
Your understanding of the law is correct. TTB understanding and application of said law is hit or miss, mostly miss.