Well, for me it's simple.Eugene wrote: How to reproduce the problem?
Try creating something under Collections - let's say "XYZ".
Then add some path with files to WMS, but in this path having some directories
(eg. add c:\movies\ as path, containing c:\movies\movie1, c:\movies\movie2 and so on)
Then try to drag this movie1 or movie2 and move it to "XYZ" under Collections.
You can't, you can only move such directory directly under Collections.