@resale_to_help
If I'm understanding your question, it sounds like you're choosing to sell similar in order to relist rather than choosing to actually relist.
If you "relist," the item is removed from your unsold. But if you choose "sell similar" and relist the same item, you have to go back and delete that item from the unsold. Ebay doesn't know whether the item you listed as "similar" is the same item or just a similar one so it doesn't get removed.
albertabrightalberta
Volunteer Community Mentor