When you first sign-up to Auctiva and pass the Token, Auctiva automatically pulls all your Active listings and adds the Scrolling Gallery. Note, that process can take some time, as they go back through a security check at eBay.
Any new listings submitted from Auctiva will have the Scrolling Gallery appended at the location you choose in the Store tab under "Edit Scrolling Gallery". The defaults are the SG at the top of the listing and it is enabled in your Account Settings (under Listing Enhancements).
Normally, Auctiva begins pulling all active listings almost immediately to add the Scrolling Gallery.
If that didn't happen, I would contact Auctiva by opening a Support Case, so they can investigate the cause. I do know they were doing a "site roll" of new code yesterday, so that might explain a delay.
You normally get a confirmation of opening a Support Case via eMail. I would check for status on the case you filed.
A Support Case is entered at the Help link at top of page. Look at lower right on the page for "File a Support Requet or Check the status of an on-going support case".
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .