You're right that it's the obvious answer, but I've been using NX2 for years on NEF files and have processed many thousands....these are RAW files.
These are the first ones I'm attempting with my D800X, but something's definitely wrong.
When I open any of my D2X NEF files right now in NX2, everything is fine....right size, all processing options available. If I then open a NEF from my D800X, it opens as a ".NEF", but in Metadata, it lists image size as 1632 x 1080. That sounds suspiciously like a movie size, but that's not even an option...it's 1920 x 1080.
The File info in Metadata says: File Size: 72.9MB Image Size: 1632 x 1080, FX Image Quality: RAW (12 bit)
On the camera, this is set for 14 bit, so I don't know why it says 12. I've gone over all my camera settings again, they seem fine.
Bizarre, but I'm hoping I'm just missing something obvious.