We have expereinced this when shipping to Canada - seems once customs takes it everything goes quite until it arrives at your door. I do not know if it would be the same shipping the other way around or not. maybe it has to go thru bother Canadian and US customs, Remember labor day was the fifth and probably nothing got done if you do not receive by the middle of next week or you do not see any other info posted you should call the company you purchased from and have them put a trace on it.
Hope this helps
Karen/Girltankette