Facebook often combines similar posts from applications. I notice on my wall, I usually see only the most recent Evony post (whether it's mine or from one of my friends), and underneath there will be (in blue letters) "Show ## similar posts". If you click that, it expands the list to show all the Evony posts that have come out since you last clicked any.

Also, up at the top of your wall page, there are two feed options... "Top News" and "Most Recent". When I log in every morning, it's always on Top News, and I usually have to switch over to Most Recent to see the latest posts from my friends - including any Evony posts.