Navigation Menu Issues

Hi, I the Weaver II pro theme and I am having issues with sub-pages under the main navigation menu.

I am trying to add pages to my last menu, i.e. right hand side of the page (featured images) and only two sub-pages are being listed, despite my adding several pages to this menu.

Is there a limit to the number of pages i can have under the primary navigation?

https://raydevlinphotography.com