Heard back from a good Delta person. They say I always had a space on the plane, but just not an assigned seat yet because of the UR booking and something unique to this flight, and that had I called Delta directly anytime I could've gotten a seat assignment and known to go drink a bunch more cervezas and not worry about if I'd get back to america. They also sent me a choice of $100 gift cards for them, amazon, bb&b, best buy, darden, lowe's, nordstrom and lol starbucks among others.