Just within the past two weeks, often but not every time, when purchasing a USPS Ground Advantage label via Amazon, the highlighted preferred Amazon shipping method is Ground Advantage, we choose that, but when the label prints, it is not printing correctly. Instead of the G in the upper left corner, there is a box with an X, which is what usually shows for Media Mail Or Bulk Printed Matter, there is NO lettering on the label for Ground Advantage. There is tracking, the package is usually delivered in normal time, but the label is incorrect. What the heck is this???