No surprise here. You need to learn how to rely on our self doing things and not on someone else because they always eventually fail. I never submit tracking number but I always send buyer photos of the receipt with the tracking on it. That way I can't make mistake putting wrong number in and buyer can track the  item them selves if they're not lazy to do so. And they actually like the extra step I take for them. I really don't care if ebay requires it or not, they don't pay me for doing extra clerical work.