Many thks indeed for yr prompt reply. I am grateful for your help over a long time in Gnutella Forums.

My list is in WORD 2016, not in EXCEL; however, I have solved the problem, as suddenly it dawned on me that my list was not strictly in alphabetical order as one of the item headings that I had put down as "C1" was put in by WORD below "C2" because in "C1" I had added a couple of superfluous words to the heading "C1".
When I removed the superfluous wording, the list went to the alphabetical after I hit "Sort By Name".

Kind regards.

Joe B.