Link Scoring: A page is returning 1 for Stemmed Keywords but zero for Total Words in Body

For this URL:

http://www.jcwhitney.com/wrenches/c21219j1s17.jcwx

If you score it, with the following three keywords entered:

link, here, blog

What you get in the output is:

Stemmed_Keywords_Total_Body = 1

Total_Words_In_Body = 0

This doesn't seem right, and also causes an astronomical relevance score (I add a very tiny .000001 anyway in my spreadsheet so there's never a DIV/0 error, but the score ends up incorrectly high).

I've included the report output, with all rows except the offending one eliminated, if that's of help.