Wierd normals when modeling inside mesh ?

Ok so i have no idea how to approach it.
Usually i just flip the normals, but this time it’s acting weird when i started modeling the mouth…

http://www.pasteall.org/pic/show.php?id=27285

These are the areas.

And the normals
http://www.pasteall.org/pic/show.php?id=27286

http://www.pasteall.org/pic/show.php?id=27288

I think this part is what caused it if i’m not wrong.
.blend
Any idea why this is happening ?

EDIT : Sorry for the big images i can’t upload attachments.

~Wentzel

i watch the blend file… flip the normal manually using the property panel because use recalculate the normal don’t work. use only flip normal on all face that have this issue, i think its, duo to the topology of the mesh.

Thanks @ rebellion.