I have noticed that there are multiple copies of several library subassemblies when I view the subassembly list drop-down list in the edit design data tables. From speaking with Steve Carter I understand that the list includes not just the library subassemblies but copies of those subassemblies where they have been modified within a product that has then been saved to the library. It would be nice to be able to either filter-out or differentiate these modified subassemblies since I would not want to use them in another product.