NL Sales - I have the feeling you're not quite getting the concept. You need to click the PROFILES tab at the top of the Auctiva page, then the "Manage Seller Details" link, then the "Edit" button for your saved seller detail profile. Please re-read the preceeding 2 posts as they are spot on.
Folks seem to get confused due to the fact that there are 2 types of "profiles". (also commonly called "details")(profiles are a saved collection of details). There are ITEM details (those items outside the template (which screenshot 1 refers to), and SELLER details (inside your template, screenshot 2). They are separate types of profiles and are accessed,configured, and named separately, through the PROFILES tab.
We all went through this. And still are!