multiple materials on one mesh change order

I am working in a modo to unity pipeline. When I have multiple materials on one mesh the order gets screwed up every time I open the mesh in modo to adjust something. I am using the .lxo format which I gather uses collada behind the scenes. Any help would be appreciated.

There is a whole section in the forums for third party modeling tools. Those guys are alot more apt to be able to help than this place is.

http://forum.unity3d.com/forums/external-tools.22/