I'm having a similar problem to the person in the post below:
Specifically, I can see data (e.g., number of words, readability stats) when I'm editig each individual post. However, this information is not included under Dashboard->Word Stats for several posts.
I've done the following thus far:
Uninstalled and reinstalled the plugin.
I am using version 4.3 of the plugin on Wordpres 3.5. My blog is located at blueprintjd.org/blog.