I'm using a Nikon d3300 and PS CC2017 and LRCC2015. I imported the directly through Adobe software, nothing of Nikon's.
On the Mac I used "Get info" and the second half of the RAW files shows a created date of 1/1/1970 and a size on disk of zero. The first half of the RAW files show a creation date of 8.7.17 and a more accurate size on disk. It's almost like the second half the files are empty and the data for each file is set to a zero or nominal value.