Once again, old deleted pictures are magically reappearing. I relisted a sold-out item this morning and the first picture was one I deleted from the listing a while ago. The deleted photo didn't show up as the first picture while re-listing, it popped into the first position after the listing went live. This has happened previously due to Etsy working on the app. When it happened previously variations became unlinked, etc. Previously I had it happen to listings that I had not renewed. So you might want to double-check some of your listings if you have time to make sure they aren't wonky. Etsy was never able to correct the problem, I had to do it one listing at a time.
@DragonflyDreams1 Thank You for the Heads Up. That's pretty weird. Are you using the New Listing Page? I have also heard the App can be glitchy (have never used it personally).
Etsy probably used back-up copy to restore the lost listing or lost photos. This may be the reason the old photos re-appeared in the listing.