I do see what you mean about updating your store categories. I just went and updated mine in Auctiva and then logged out and then in and I get the greyed out link too. It may be a time issue, like waiting until Auctiva refreshes/updates with Ebay which is about every 6 hours? What I would do is create listings, save them and then go back to put the store categories in once you can update on Auctiva. Maybe give it until tonight and if the link is still grey send in a help request (or maybe just go ahead and do that now to get the ball rolling).
Once you can update your store categories (and I should have suggested to go to ebay first to set up your categories BEFORE updating your settings on Auctiva, sorry!) then the listing page WILL reflect your actual categories, not just 1,2,3 etc. and it will show the 30 day or GTC options.
And yes, once someone buys your item, the auction/store item is over and will cancel itself.
Marcia
