I don't know if you guys have experienced this before, this was a first for me after 500 hours of playing Napoleon. It looks like somehow Denmark in my French Grand Campaign is in possession of the Cadiz Cortes tech, which is from the Peninsular War DLC. I have never seen anythign bleed over from one campaign to the other.
Interestingly enough, they would not trade it to me.
Spoiler Alert, click show to read:



