Found something interesting today that I've yet to see.
If you notice on my first picture United only shows 8 seats in J on the 739. However this aircraft per seat guru has 14-20 J seats.
UA is displaying to the customer 8 seats avail on the aircraft but after booking (image 2) you will see there's clearly 20 seats. Since the price is at $409 during an holiday end of this year, I highly doubt the other 12 seats are sold. I did the same with the neighboring dates on the calendar it did the same thing.
Anyone see this before or just new?