User Activity

Does anyone else seem like your items are being blocked by Ebay or is it just me? My sales near stopped a couple of months ago.
I sell items that I ship as small packets and no tracking number is provided but a reference number. So can or should I add the reference number in place of the tracking number after each sale? Thanks!!
Can I print shipping labels for small packets from Canada to USA? Will I save on shipping cost to print shipping labels rather than do it at the post office?