I've just about given up. I've set my DVR to record events based on the guide and the NBC online schedule, only to have them record something totally different - or the same events multiple times. The events also don't end on time, but my DVR stops right when the listing says it should.
Very aggravating, to say the least.
Here in Latvia, the same thing is happening, the only way to see full events is when I'm watching LIVE, but I know I will miss some events and if I DVR it, some events don't end in time either so I have to guess the end results or look up online at the end.
I haven't experienced my recordings not matching what is supposed to be showing at that time (both according to the online schedule, as well as the guide/program information), so I can't speak to that, not yet at least. I can, however, say that, if your DVR allows it, you should ALWAYS extend your recording time. Actually, I now start all of my recordings a few minutes prior to the scheduled start (anywhere from 5 minutes to 15 minutes), and I ALWAYS extend the recording to the maximum time allowed (which is, I believe, set to 90 minutes by default). I've never had issues doing that.
Now, I will say this much......
For sporting events, such as the Super Bowl, NBA Finals-clinching games, World Series-clinching games, Stanley Cup-clinching games, and other major sporting events, I also record shows that come after the sporting event (Usually after the 90-minute extension runs out). For example, lets say the NBA Finals are scheduled to run from 5 - 7:30, I always extend the timer an additional 90 minutes (so it would actually run from 5 - 9). AND, I will also record whatever is scheduled to start at 9 that night, and I will even extend the timer on that show. Just to be safe.
(I never understand why the TV guide/networks only allocate 2.5 hours for a professional basketball game, or 3 hours for a professional football game, or even 3 for a professional baseball game for that matter. Cuz, 99.9% of the time, the games always run over that time period. I can't remember the last time I recorded a basketball game that finished under 2.5 hours, or a football game that finished under 3 hours. I think, in terms of the TV guide/time allocated for the game to be televised, TV networks should allocate 4 hours for pretty much all of their sporting events. Because not a lot of people are like me, and they don't extend their timers, or some don't have the hardware/software capabilities to perform that task)