Oh, and I am extremely happy it made it to you. I actually called the PO today because the tracking number note said, shipping was electronically received, which may or may not have meant that USPS received the box(I use click n ship).
Since I sent a total of three boxes that day, and the other 2 were delivered, I was fearful that USPS had lost the package and would not acknowledge that they even received the box.
For future reference, the lady at CS for USPS said that if click n ship is the method used, at the very end of the process, click "print scan form" and send it in with the boxes. By doing so, USPS scans the boxes when they receive it and acknowledges receipt of package, instead of the "may or may not have received it" notification.