Other mistake: After the train crash the news crews and sheriff are interviewing the surviving corrections officer. He boasts how heroic he was to rescue his partner from the wreckage, claiming that he was his partner and he would do the same for him. The only problem is that they are surprised when they find that same surviving corrections officer several scenes later and rush him to the hospital. Why would they be surprised to find an officer they already knew about?
Suggested correction: The first corrections officer had been exposed as a liar and made up the story that Kimble and Copeland were dead. Nobody believed he heroically saved his partner. Everyone assumed since the partner hadn't been found right away that he died in the wreck. It never occurred to anyone that Kimble would put his own life on the line to save a guard, so actually finding the guard alive was a surprise.
There is nothing formally wrong with the order of events here. The assumption is that the second officer's whereabouts are known at the time of the senior officer's story - but that is actually only an assumption. Finding the second officer would of course not be important to the main story in any way, and thus this sub-story was not explained in the movie. To word it an alternative better way, why would the senior officer make up this story of saving the second officer, if the officer had not been located yet?
The second officer's whereabouts are most certainly not known when the first officer is interviewed. The first officer is interviewed the night of the crash and the second officer is found the next morning.