Don't use a favorites list....but this NBC channel has had the two listing since we got our high def channels back in September. But they have always been standard def on both. That still appears to be the case. I click on both channels for 26 and they look exactly the same as always...does that make sense?
On my receiver there is now only one channel 26. It has "side bars" like an HD station but is definitely 480i. I made sure I had ALL CHANNELS selected on my favorites and did a reset on the box.