Facebook looks at all possible stories and says "Which story has the highest Edge Rank score? Caveat: There actually appears to be two algorithms, although this has not been conclusively proven.The Edge Rank algorithm ranks stories, and a second algorithm sorts the newsfeed.It'd be completely overwhelming if the newsfeed showed all of the possible stories from your friends.So Facebook created an algorithm to predict how interesting each story will be to each user.The average Facebook user uses Facebook not for business but for personal communications. In fact, I explain my Facebook usage by stating that if you want to follow me in a professional capacity, you can use one of my two fan pages. If you are officially representing your company, you’d want to create an Official Page. They are outdated (from Facebook’s early days) and do not support Facebook Markup Language (FBML) or Facebook Apps, so they are not as interactive and thus do not make as strong of an impact.
There are more scenarios, usually when the feeds it not updating, there might have been a change on the side of the website,blog,news site you follow.
It's been about 24 hours since I last went on and i'm seeing the same posts from yesterday and several days ago.
I have been having this frustrating issue for quite some time.
Facebook calls this algorithm "Edge Rank" because it ranks the edges.
Then they filter each user's newsfeed to only show the top-ranked stories for that particular user. Let's show it next." If Edge Rank predicts a particular user will find your status update boring, then your status update will never even be shown to that particular user.
My ticker and news feed are not updating, despite me logging out, clearing my cache, trying different browsers, et cetera.