I too have watched stuff come clear across the country to a place near here, only to be shipped clear back across the country and then come again to finally achieve delivery. Other times I have seen packages travel to places that seem to have no bearing on logical routes to here, only to linger for indeterminant periods of time, then to go somewhere else seemingly strange and unassociated, before finally making it here for delivery.
In each instance, I could see nothing wrong with the original address labeling that would have sent it to odd places nor clear back across the country and then back again.
Still, the vast majority of what must go through the various carrier services really does arrive here first try in a timely manner, so I suppose I should really not complain too badly!?!?