Content from all articles is displayed twice, as seen in http://samc.cat/index.php/home/samc/qui-som
Thank you
Article text is displayed twice
- Edited
If you select Layout-1 for article and setup Hide Intro text on the article setup and on the menu Item and don't use Page Break inside article for creating Intro and full text, then you create error self 
I see original article after instalation demo and is ok:
https://ja-purity-iv.rubstudio.cz/index.php/explore/j-pages/typography
https://ja-purity-iv.demo.joomlart.com/index.php/explore/j-pages/typography
This solved the issue.
Thank you very much for your help.