What limitations does the standard form submission process pose when trying to save the rearranged data from the lists into text files?

The standard form submission process in PHP typically does not allow for saving rearranged data from lists into text files directly. To overcome this limitation, we can use JavaScript to dynamically rearrange the list items on the client-side and then send the updated data to the server using AJAX for saving into text files.

```php
// PHP code to handle AJAX request for saving rearranged data into text files

if(isset($_POST['rearrangedData'])){
    $data = $_POST['rearrangedData'];
    
    // Save the rearranged data into a text file
    $file = fopen("rearranged_data.txt", "w");
    fwrite($file, $data);
    fclose($file);
    
    echo "Data saved successfully!";
}
```

In this code snippet, we check if the POST request contains the rearranged data. If it does, we retrieve the data and save it into a text file named "rearranged_data.txt". Finally, we send a success message back to the client.