Not really a bug, but certainly weird behaviour. My wife is an Olympics freak, and records EVERYTHING!!!
So, she had already set up a manual one off recording of the opening ceremonies before I set up a subscription.
I did set up the subscription before the opening ceremonies aired, so when it recorded, I ended up with 2 copies (I assume 1 from the manual recording, and 1 from the subscription). This seems weird to me. Not sure if it tied up 2 tuners.