What are the original file names of the files that got mismatched? If you notice a mismatch, then you can press the F7 key on your keyboard to quickly copy file paths & match information to the clipboard so that you can then CTRL+V paste everything here. That'll allow us have a look at the file paths and mismatches and recommend how to best deal with the task at hand. My educated guess would be a mismatch between DVD order and Airdate order. See How to Request Help for details.
You can simply revert the current file names back to the original file names via the history and then try again. Make sure to double-check the proposed matches (and fix if necessary) before clicking the Rename button this time around.
What are the original file names of the files that got mismatched? If you notice a mismatch, then you can press the F7 key on your keyboard to quickly copy file paths & match information to the clipboard so that you can then CTRL+V paste everything here. That'll allow us have a look at the file paths and mismatches and recommend how to best deal with the task at hand. My educated guess would be a mismatch between DVD order and Airdate order. See How to Request Help for details.