Hi,
You are doing nothing wrong! Auctiva does not update their "Estimate Fees" when eBay has a special; it would be too time consuming for them. But don't worry, you will get the special rate if your listing meets eBay requirements for the special (i.e. Auction only vs. Fixed Price listing). This special is for Auction Only so make sure your listing is a basic auction and you will be OK.
Doug
Cash Back !!
Cascade Coin & Collectibles