If you select more than one container in the binder and then switch the editor to cork board mode, then add a new card to the topmost container’s section of the cork board, the addition of the document to the binder is shown, but the selection does not follow any containers that are shifted down by that addition.
Illustration:
Folder1
->document1
FolderA
->documentA
If you add a “document2” below document 1, then the binder highlight that used to be on FolderA will stay put, instead highlighting document2.
Not a huge deal, but I’d think that either the selection needs to follow the object as it moves, or the selections should just be cleared, since they don’t actually reflect what you clicked on earlier.