I just tried changing the feed sorting order to "Most Recent" and found that it only displays 4 posts. One post from a page I follow, one advertisement whose s

I just tried changing the feed sorting order to "Most Recent" and found that it only displays 4 posts. One post from a page I follow, one advertisement whose sponsor was liked by one of my friends, one post that links an article from one of my friends, and a series of posts on a friend's wall for their birthday. At the bottom, it says "there are no more posts to show right now." If I change the sorting order back to "Top Stories", it shows far more posts and the first four are in the same order as the ones shown in the other sorting order. Given that, I don't have much incentive to use the "Most Recent" sorting order it seems.