On double checking my last post I see that my listings are under the Regions "French Cameroons" (sic) which is an incorrect spelling by eBay, and that they all start the Title field with the correct wording which is "Cameroun".  There should be no obligation to write the word "French" in the title as these are listed in the Category "France and Colonies".

This proves that the Search is not being conducted on the Region field as requested.