I'm sure someone will correct me if I am wrong - but I believe that the templates are set up for listing through Auctiva as there are codes that only Auctiva will recognize.
As for the token - you do have to sign into eBay and authorize for the third party (Auctiva). After you authorize that - you should be okay.
You could try the typical clearing of your cache, cookies, etc, if eBay is not letting it continue. It could be something on their part as well.