Welcome to the Community!
Sorry to hear you're having trouble with the Box Sets.
Have you tried performing a mains reset on the TiVo®? Just switch the TiVo® off at the mains for a minute, then switch it back on.
Does this issue affect both of your TiVo® boxes or just the one?
Look forward to hearing from you!
Tech fan? Have you read our Digital life blog yet? Check it out