In the years since Matt arrested Hardin, and Hardin earned a law degree and was released, Matt had the same shirt on. Look for the same dirt and dust stains.
As the train with the cattle that are to be stolen goes by the camera, it can be seen through the slats that the cattle car is empty.
When the cattle are stolen from a train that is supposedly moving, it's obvious that the train is stationary. As the cows are individually forced to jump from the train, there is a ramp for them to jump onto.