My apologies to everyone, but it seems I uploaded the old v1.0.0 BETA 1 release and labeled it v1.0.1.
So the bug/spelling fixes weren't available for download.
This has been corrected, and I have released a new version v1.0.2 (aka BETA 2)
If you look at the included "Installation Instructions.txt" file it should say:
"Adobe Photoshop Lightroom Export Plugin v1.0 Beta 2".
So please, download the new version, and enjoy EXIF date posting!
So this explains why everything was working properly on my end, as I was actually using 1.0.1, and everyone else was stuck with the old 1.0.0 code.