Is this the only channel that exhibits this behaviour?
Yes it’s the only channel. I’ve done this same process for other channels that have both HD and SD versions but only this one refuses to show proper favorite in favorites guide.
How are you choosing Favorites in the X1 box?
"There are two ways to get to the guide: 1) press Guide twice and 2) press Xfinity, select Guide in the cross-bar and press OK. Add (Delete) a Favorite: "
“ How are you choosing Favorites in the X1 box?”
If you mean how am I adding favorites then you arrow all the way over left till your in channel name, select and an info bar appears at bottom of screen and you click favorite.
I tried some things yesterday and I noticed my "settings" had changed.
Turn to a channel and watch it. Then press the Guide button TWICE and what do you see?
Mine is not what I thought I had it set for.