Update (11/12/17.1)
OK. Certainly my bad :( Thought I had the EPG sources set for all the channels (Configuration->Channel->Channels) and actually did and didn't pay enuf attention. Apparently during a recent update it must have cleared all the entries (except for channels 1.X and 11.X).
Redid all the entries and now have my EPG guide back.
Appreciate the time and help.
Cheers.....
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True. Not the 1st time.
Configuration->Channel->Channels: checked and everything is there
Configuration->Channel->EPGGrabber Channels: If the names don't match, that would be something new. However, I'll check in again.
I went back and looked at TV/Guide and discovered it's not all "No information found". It's the same as I found in TVHeadEnd - The channels that are shown with information begin with a "1" (1.X and 11.X, etc.). So, the TV/Guide and web interface are consistent with each other...which might be the good news here.
Checked the xmltv.xml file again and all the programs for all the channels I've selected are listed in the file.
Something somewhere is causing unwanted filtering. Any ideas?