"Keep through" date being pushed forward

I'm seeing an issue on my Premiere 4 where I set the "Keep through" date to a specific date in the future, but that date is being reset to a later date without my input, thereby keeping the shows from getting deleted (I've seen it happen twice now for the same shows). This problem is occurring with all four shows for which I've set a "Keep through" date. Each was originally recorded with "Keep until I delete," which I manually changed after watching them.



Has anyone ran into this problem before?



Thanks!