SharePoint 2013 My Site Newsfeed Posts Disappear

I have found that posts in my Followed newsfeed on My Site disappear after about 2 weeks even if I don't have 10 posts. If I go to the site where the post was made I can see them there, they just disappear from my My Site newsfeed. Old Feeds appear in my Mentions Feed and in my Activities Feed under about me, it seems to just be the Following Feed. If I click the Show More Posts link no extra posts are displayed. Is this by design or is there a setting somewhere that can change how long posts appear in your My Site Following Newsfeed? I'm not sure if this has to do with the AppFabric Caching Service or not.
Thanks