Exporting FaceGen data creates distorted model

[Lyremanbird]

Whenever I export a character's face to .nif, it comes out sideways, with their hair bent downwards and necks twisted. Also their neck gore-bits come out stretched and distorted. Some specific characters have their hair inverted (ie the front faces are culled and the textures aredisplayed on the backfaces). Is it always supposed to be this way? How do I prevent this?

[Blinxys]

Not sure why you are down this rabbit hole... faceripper is quite effective for most facial feature related functions.

Also you did not mention what program you are exporting from.