I don’t know why where is set the name “masonry-portfolio” that is shown in the URL bar. The only field that contain this name is the “template” oh K2 catagory in use for the portfolio. Menus and alias don’t contain this name.
Thank you in advance.
I found the mistake. There was a link (second level/parent voice of Oyster menu) with the name “masonry portfolio” that was shown also when I click on another principal voice … I don’t know why, but now It’s works.