Thank you for grabbing the International Geocaching Day souvenir and mentioning this.
Please see this link and confirm the error is on this souvenir page:
https://www.geocaching.com/souvenir/?guid=c725f78b-97a2-459e-8666-746a6c31748b
If you see the error in your souvenirs, can you please provide a link or screenshot so we can look into the text error and make the fix.
All the best,
Wandrewlust