@JohnPhilpin I guess anything's possible, but the Search Space index should just mirror the rest of your blog. In other words, if my plug-in says 30 posts and replies indexed, you should be able to count 30 posts and replies if you visit the archive and replies page.

So, if Search Space shows a number that feels off to you, something is probably up with the build process. Might be a good time to force a rebuild and see if that solves the problem.