Hi,
I'm sure that neither Auctiva's nor eBay's systems will automatically update your listings. You'll need to be sure that your checkout profiles in Auctiva and check out settings in eBay comply with the new policies, and then list everything from now on using only those updates. As for currently running listings, I think you're okay. Nothing will renew though -- such as eBay store GTC listings for example -- unless those profiles have been updated.
Wanda