I was finally able to get a FedEx tracking # for my two MIA tires. They were shipped with the two that arrived but somehow split up in transit.
Get this, I see FedEx notification they arrived at Walmart, go in to see if they can fit me in, and they can't find the two tires they received the day prior. They supposedly looked around, asked around, and nobody knows anything, so they don't know what to do except wait longer and if they don't turn up, get a refund and reorder.
I wondered around their tire racks and found them, with my name right on the label. They didn't look where I found them because "they weren't supposed to be there". They couldn't get the tires put on that day, so still not installed.