Since it's not noted explicitly, I will ask this, did you confirm that it actually downloaded to your tivo? Sometimes it won't due to space issues at the time of download. If it didn't in the first place, you should still be able to download the program from unbox online.dkh7m said:
Otherwise, you've got a good question, and I would interested in the same answer.
Otherwise, It's my strong opinion that Rented or Purchased content should automatically be set until I delete. I wouldn't apply this to all content like the tivocast stuff, but certainly to unbox stuff.