Photoshop should retain that data no matter how many times you resave. The only time it would be expected to lose it is if you saved to a format that didn't support them.
The cover image had been resaved a minimum of three times IIRC from the metadata
There were also four photoshop "work paths" in the jpg, but again these COULD be just forgetfulness. One was named something like asdasdasd
It would be good for somebody to see if there are any layers/paths/metadata in this new version.
This should make that schematic t-shirt make a little more sense anyway
And we still never decoded the first NTAE video.