Maybe someone else can check and see if I'm going nuts?

I do a Yahoo search, then click on a site to visit. Normally, when I go back to Yahoo later, and do the same search, the site is listed as visited (it turns from blue to purple in my browser Firefox 27.0.1). Now, when I go back and do the same search, the site remains blue, as if I never visited. This is the same for any page I visit. I opened Internet Explorer and the same problem appears.

Yes, I am logged in. I have tried deleting cookies & temp files, no luck. And considering it happens to me in multiple browsers, I don't think it's a browser issue. I'm hoping someone can confirm/deny!!