Q: Why my deleted items are reappearing on Sku Grid?
A: The items may be reappearing in your Sku Grid account if you had Auto-Create Items in Sku Grid that Exist in eCom Syndicator but Not Sku Grid checked on your eCom Syndicator settings. After an item ends on eBay, it takes 8 days before they are auto-deleted from eCom Syndicator.
So with this option checked, the items kept being added in as new entries (they're paused, with no supplier URL). Once you have disabled this, they will no longer keep getting added to your account.