Problem with the subnav link background colour

Hi,

I am having an issue with the subnav background colour not being consistent with all the pages. See here: http://prntscr.com/8ssby5 http://precision.metamode.com.au/our-services/

But if I check the same subnav styling from the about us page it’s fine http://precision.metamode.com.au/about-us/

I’ve added the same css that came with theme into all pages but can’t figure it out. What am I missing?