Menu Permalinks issue

Hi,

I have recently added 3 pages to my website and I have added them as sub menu.
Unfortunately, when I click on one of them 3 sub menu, they redirect to the home page but not the appropriate page. Sometimes it works and sometimes it does not work.

Please can you advise?

This is my site: www.labodabridal.com
Go in to menu and test these pages:
Bridal > Pronovias
Bridal > Watters
Bridesmaids > Watters

Thanks for your help!

Marion