The USPS auto fill is great, however typically you can add up to 10 labels in the usps shopping cart… But when using the auto fill, as soon as you try to add another label to the cart, it logs you off the usps website, makes you log back in, and then the label you had previously put in is not there… Is it supposed to be only 1 label at a time, or is a glitch or something that can be fixed?