Okay, well I recently signed up and put the scroll gallery in one of my items. Well, what they didn't say was that your items will dissappear for about 6 hours.

The problem is, I cancelled my account before the items showed up in the search bar.

Can this lead to permanent deletion of your item?

Thanks

No.

your listings haven't disappeared, ebay is checking them out and adding them to the searches

auctiva has nothing to do with it, so cancelling your account won't affect it in any way.