I re-activated your plugin and tried again and this time I got the matches I expected. Not sure what is different since the plugin hasn’t changed. I also tried the Better User Search plugin and found it worked as well. Thanks to both of you for following up.
Roger
Couldn’t you add the CSS style to your style sheet? I would think the only reason for not doing so is because it pollutes your CSS. But, strictly speaking, you could fix the issue by adding that CSS.