I saw the post to santiae about the hilite script.
If you take it a step futher, I created the Sort by Owner Ascending and Descending scripts and they work fine. I started with the template in the Business - Project, Issue Tracking. My issue is when I create a script to combine the 2 as a where it will toggle a-z, z-a, the script works 3 times (descending, ascending and then descending) and then no longer sorts. The individual scripts work fine. Did I miss a step in the database step?