I have the same problem with my site: http://simplebeautyhairdesign.com/
I added the new page, 'contact', and when I click on it, on the main menu, it doesn't load from any other page. I checked the 'page source' on the home page and it shows that there was no reference link created to the 'contact' page on the menu description line (Contact</div>) the ref link http://simplebeautyhairdesign.com/contact/ is missing.
Is this editable?
I also tried changing the theme and the problem was solved, but when I reloaded the original theme the problem reoccurred. I am really pleased with this theme, hence why I want to resolve this bug. I also checked this on all of the browsers and it's the same problem all of them.
Appreciate any help!