From what I can tell, the DVR appears to only be prompted to update its Guide data if:
- it has 7 or less days available
- you scroll forward in the Guide past the available data
My Guide averages 10 days. It seems to max out at 12-14 days. Scrolling forward in the Guide only updates the screen data that you are viewing, meaning if you skip forward or don't scroll up and down, this data may not load immediately. And currently there is no function available to manually prompt a Guide data update.
I just posted an Idea suggestion regarding a solution to this issue. Please go here to add your voice and your vote.