I'm not the theme author, but, looking at the theme, I would guess it's because the "selector type" line in the .cfg file is commented out, so presumably it's just keeping the selector type that the previous theme set (looks like 'inverse' in the picture).
[edit] Personally that issue wouldn't bother me. You could edit the .cfg file yourself to uncomment that bit, or just set the line selector type via the settings menu.