Thank you for responding. The column was custom, but I used calibre to populate it--I did not manually fill in data, so something lurking somewhere un-did that population and did not let new books data populate the field correctly.
FYI: I deleted the column, then added it again (restarting calibre as needed).
NOW newly added books populate with the correct book format (PDF from earlier example) and all books are showing corrected.
Just letting you know something is un-doing the calibre population of the field, and restore does not correct it, but I am a happy camper to have things working again!
Thank You for your help. I did not remember the field as , else I would have mentioned it. Sorry for that.
