Hello to everyone!!

I am not new to piwigo, which is a great thing and this community helped me a lot so far. But now I have a question I was not able to find a solution.

Lets say I have:
10 photos tagged with blue
10 photos tagged with red
5 photos tagged with blue AND red

When I want to show the photos containing both blue and red I get 20 photos show up in the OSM map. In my understanding only 5 photos should show up!?


Is there a way to get this working?