Flight status display at the airport spells Nevada as Navada.
It makes no sense for the weed delivery to be set up so the time travelers' goggles are flooded with marijuana smoke. He can't inhale it that way. Instead, the smoke would ruin his eyes and force him to tear off the goggles.
Stan Marsh sends his father a cannabis bud from the future from which Randy grows the post Covid special strain. It is not possible to grow Cannabis from buds that were cut off before insemination like that. You either need inseminated seeds or at least shoots cut from a plant.
The doctor at the asylum refers to Victor Chaos as a "diluted" individual (with a long i as in die), rather than deluded. (Deluded is usually pronounced with an unstressed first syllable, so it's easily mistaken for diluted in speech; since the i in diluted can also be pronounced long, the error takes a strange turn.)