After I upgraded to 2.1.3, many, but not all of the collection names and parent collection names were lost, replaced by "Untitled." I noticed it after I upgraded the Collection Tree plugin, but it might have been like that from the initial upgrade. I tried deactivating the Collection Tree plugin, but this did not change anything.
Tree: http://njdigitalhistory.org/NJDHA/collection-tree
Collection View: http://njdigitalhistory.org/NJDHA/collections/browse