Buggy Navbar Menu

I’m using Guardian 2.7. The menu (class=navbar-header) is buggy. This behaviour start when width<=479px, subitens color changes to red instead of the normal color.

Also I had some suggestions: 1-disable light blue color on subitens; 2- disable strong blue color on “current page” and let it on only on hover.
I believe these could provide a more clean and intuitive experience to users.

I will try to figure it out later if I have time. Just learned CSS.