I think that when parcels get stuck in Cheektagowa, it is because of customs. I have been watching my pocketchip + charger order since forever, and LandmarkGlobal provides USPS tracking numbers for our parcels before they even leave Hong Kong! Obviously to me, USPS will not know about a parcel if it has not received it. Mine did not get stuck in Cheektagowa, instead, after leaving Cheektagowa, it seems stuck in Pennsylvania since last Thursday. The USPS tracking number works, but says they have not yet received the parcel. Maybe it really is still in Cheektagowa and the number just got uploaded to Pennsylvania, I don't know.
If you look at the old topics here where people post their shipping information, a whole lot of the time, parcels seem to have gotten stuck in Cheektagowa for a week or two, before they moved on, or were magically delivered despite the fact that USPS tracking did not give progress until they were delivered.