[development] CCK fields, Views, and Sortable column

I need sortable column headers, ideally using CCK and Views. So, I created 3 CCK fields. Then I created a page View using the "table" View Type. In Views, only one CCK field, the "address" CCK extension module, provides a dropdown for Sortable. In other words, only one field (address) is sortable. I need multiple fields. Is this a bug, or (more likely) am I doing something wrong? Thanks! Sean