There seems to be a bit of confusion. The "_original" files are your original files. ExifTool renames them to preserve the original file when you write to a file. You must have also run exiftool on a ".xmp" file if you got a ".xmp_original" file as well. What command line did you use, and what files did you start with? ExifTool only does what you tell it, and there may be other date/time values that you need to change.

You say that the original labels and rotation information are gone. These are things that you added with Bridge? If Bridge stored anything in the resource fork of the file, then it will be lost when it is rewritten by exiftool, but I would be surprised if Bridge does this.

- Phil