I am glad you figured out the GTC date. After you perform the very first eBay Stores auctions updating process, other updates require much less time.
Keep in mind the API version only affects the manner in which AW2K communicates with eBay. Installing the API does not affect the Listing templates, Email templates, Inventory Items window, Auction lots window, Images, descriptions, JPEG quality output settings, etc.
I looked at the 2 auctions in my browser. How do you have the Page Layout ordered? Images across the top? Down the side?