My Bell, Tivo, Replay and Cable HD PVR doesn't skip back like the 530 does.
But initialy they had problems with a driver doing read after writes and everything you saw was buffered through the hard drive as you might expect.
Not unlike a true UPS, where you are 100% power off battery, but the A.C. manins are on and charging it at the same time.
The workaround was to drop from a live data stream and into the hard drive buffer.
That's why there is some buffer sizing and delay issues.
It operates more like a standby power supply, that is on AC mains until the power goes and then switches over to batteries.
I hope you get my analogy.
I had requested that they re-vist that again after some other bugs were flushed out. Hopefully, but I have no leverage anymore.
In the upcoming new IPG, the DVR sort is much cleaner implemented with the button renamed to SORT and indicators that show what is being sorted and if ascending or descending.
For those that 'missed' CC, don't worry.
Chances are they targeted a few thousand new ones each day.
At the end of the run, up to a week maybe, then ALL remaining will get it as it will be the only 530 code in the stream.