[2023] Blue sword/shirld building on add in boost overview

Just scroll further and you will see the building again with the other boost.
The reason for that is, that it does not provide a combined boost, but rather 2 separate boosts: One for attack and one for defense. Therefor it is displayed with 2 entries.  

OK, so this is currently working as intended, meaning while not ideal, it is not a bug.
You could create an idea to improve it, but please remember to give details on how to do it!