I recently downloaded titles such as X-Com an Machinarium via free download on PS+. My subscription was scheduled to end today, so I bought another year of PS+ yesterday. Oddly, these games I downloaded just this week say they're expiring on June 26 of this year when my PS+ subscription doesn't expire until June 26, 2014. Am I missing something?
Renewing your Playstation Plus subscription does not change the expiration date of content that is already downloaded and installed. Those licenses will be renewed the first time that you use them after they expire, if you are still a Plus subscriber then, which you will be if you renewed your subscription already.