One possibility is that the package is being inspected. When I sold my tube amp on here, it looked like it was just stuck in a sort facility for a ridiculous amount of time at first. Then, lo and behold, once it left the sort facility the tracking also said "cleared customs." I'm guessing the USPS guys had their mind blown by tubes or thought my OCD level packaging was suspicious or something. Anyway, point is that the tracking number didn't show that it was inspected by customs until after it cleared. That could possibly be what's going on here. Sometimes people smuggle drugs inside electronics, so your package could have caught the eye of the neanderthal manning the X-ray scanner.