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From what I can tell, LR failed to write new EXIF data to all of the files. I had to convert the D800 files to DNG because I am using LR 3 that normally will not see the D800 NEFs. I do most of my editing and sorting with Bridge and ACR, but those tools cannot alter capture time.
I ended up using Graphics Converter to make jpegs from the DNG files, and then once shown to the client, went back to the cards and the original NEF files.