A good example is the Mossy rock smart material. I load that up but the stone component will not transfer to the other folders. The moss component will transfer however. Here's was i'm talking about.
Yeah that is the same problem i had before! for me it was only from time to time though, you have this issue with all materials? A clean install might help a bit, but it is a known bug and being worked on! Sorry for any inconvenience this is causing you! :/