I can't speak about crossing borders, but I have seen many a whacky thing in shipping updates here in the US.
Last week I had a package from Amazon stated as delivered (I was here and watched FedEx pull in my driveway and leave without getting out) but the tracking info said it was delivered... I hit Amazon with a WTF?!!? and I got a new delivery the next day AND FedEx delivered the "delivered" package that day too.
Yeah, it is a mess sometimes.