Several times after packing up a card for shipping via USPS Ground Advantage the card is over the weight listed on the label. For example a single thicker top loader card with a raw weight of .3 OZ after I placed the card between 2 ding defenders and then put in a bubble mailer the package weighed 1.3 OZ - the label is for 1.0 OZ. It would be nice to be able to modify the weight before shipping as its so often close but not enough.