Is something wrong with your TV Guide? I have a series recording set up for "Unforgettable" and this past week it recorded 60 minutes instead. What's up? The recording still said the correct show name and time, but when I played it back...not the right show at all!
It looks like what happened here can be traced back to the PGA Championship event that was being broadcast live prior to the start of your show. Because that event ran late; the shows shown in the guide did not start when they were originally scheduled to. Networks will normally keep showing live Sports events, bumping back the start times on their regularly scheduled programs. Because guide data isn't updated in 'real time' this can sometimes cause discrepancies between what you see in the guide, and what is actually playing - and of course, it can also affect your preset PVR recordings as well.
We see this happen quite often for shows that were set to start after the end of NFL or NHL games. If you see this happen again in the future, you can go into the recording details and select "Other Times" to see if the episode you are looking for is playing on either another channel or at a different time.