The models have no flipped normals, no corrupt normals, it was checked it both 3DSMax and MED.
No shaders have been added this early in development either. o_O

You know, that reminds me of a game I made once where I had several models put together, a girl and her hair were seperate models. If they were both transparent any, then you might see through the hair to see her bald head. Is the alpha set any on your models?

I havent put anything in the script involving alpha toward the model (any)
If you had a similar problem (what you described is the same problem im having)
how did you go about solving it?