Menu settings ignored?

Hello
I created a menu just for mobile version of the site. There is an issue with every single menu item, it doesn't keep the right settings. For example, I set to hide author and date in category-blog view, but I see there again (m.mbnews.it/politica.html). Maybe I forget to set something other?

To test I visited mbnews.it/politica.html, and there are author and date also, so it's not MJ issue.
Check that you don't have menu items with the same alias.

I don't want to show author and date only on mobile version of the site, on regular site they are ok