There are sometimes issues with ebay that send out false info,like dispatched many days after an item has been dispatched,so as long as you uploaded tracking to ebay, so ebay can see the item has been delivered just ignore such notifications.
This notification can also appear when a seller has posted out an item, but not marked as dispatched at the same time,so if the item is marked as dispatched several days later,it can show that notice and be misleading.
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