problem 'moving' folders from one IFS directory to another

Hey all,

I was doing a little re-organizing of folders on the IFS, and wanted to
consolidate several folders into one container folder:

The folder structure was similar to this:

foldera (containing:
  foldera1 (containing:
    file1.txt
    file2.txt
  foldera2

folderb (containing:
  folderb1
  folderb2

newfolder

I opened a window mapped drive folder to the ifs, left clicked and dragged
foldera into newfolder, and selected 'move' as the move/copy option.

It started the move, and created foldera, foldera1 inside it, and file1.txt
inside that one, and halted with the error message 'FOLDERA already exists,
do you want to replace it'.

what gives?  Is this expected behaviour?  am I doing it wrong?  is there a
better way to move folders around on the IFS?

btw, if I choose 'copy' it works just fine.

thanks,

rick