Shouldn't expect anything to fit. Multiple players, players acting out of norms, etc.
Is anybody tracking the Chinese illegals crossing the border from Baja to California? The LE agency tasked with doing so has been operating under orders to NOT track illegals. And there are apparently amateur wannabees here on work visas along with actual trained operatives with cover identities.
The cartels have a whole sub-industry of smuggling dope in, by the ton. And smuggling cash out, by the ton. The PRC supplies the cartels with the ingredients for meth, you think there aren't strings attached?
DOD has operated clandestine aircraft over the Contiguous 48, mostly in a careful fashion but not always. The normal Army UAV folks have their TTPs, but the secret squirrels surely don't abide by regulations and standards (ask any 35T you run across).
Messy situations usually don't have clean explanations.