vidi (7/16/2017)
the top should not be TYP eye . It must be TYP Cloth for choose the Layer function
This is the second time I see it, when it comes from Blender
I believe it is an input error in the copy skin menu
Maybe you have selected an option wrong ?
I don't know how the "Type" is determined when importing into CC. None of the videos I've seen about creating, or converting models into clothing specify that. It's like CC just "magically" knows which type to put for the model. I followed the steps from in the below tutorial the from around the 9:23 mark. The only deviation I made from that video is that I made the clothing item in Blender instead of importing an OBJ of DAZ3D clothing.
https://youtu.be/oVtxT3I1OYg?t=9m23s