Hi @elliot,
Thank you for continuing to research this issue for me. Since the solution at the URL you provided seemed to demonstrate another way to sort the rows in the users table in the Dashboard, I developed a custom solution to meet my requirements. In short, I added an “Advanced Search” page to the “Users” section of the Dashboard and had the page call a MySQL procedure that I wrote. You can find more information about the solution I developed at the URL below to the WordPress support forum.
Thank you again for all of your help. Here is the URL.
http://wordpress.org/support/topic/querying-the-wp_usermeta-table?replies=2
