

Hi guys, I have a little bit of an issue regarding postage. I sell pokemon cards on Ebay, made a sale this morning, generated the label through Ebay simple delivery and dropped it off at the post office. Item was accepted as per usual, didn't think anything of it. Royal Mail's tracking says they received the item at my chosen post office (I also have the proof of postage and sent a picture of it to the buyer). However ebay in the order tab say that it still hasn't been posted and that I need to post it by the 29th of May, when I already have posted it.
Is this anything I should be concerned about? When will Ebay class the item as posted?