After applying Bates numbering, the file is saved over the orignal immediately without the option of doing Save As to create the new file. You shouldn't have to go to the options dialog box every time to make sure your original file isn't saved over, or you shouldn't have to create a copy of the file first. You shoudl be able to open original file, apply Bates, then so File save as to create the new file. Performing a task should never immediately save over a file.
Request is: don't save over original opened file after applying Bates. Let the user have the option to save As.