Multiple Folder Back up

Hi there,
I have three computers (at work, while I don't have admin rights it isn't needed to back up the files I want which are user generated) to back up on a regular basis and thought that this might be a solution to my problems. The major issue I'm having is that Toucan will not backup multiple folders (from My Documents).

I can add the folders to the list but when it comes to hitting OK it doesn't take long and it only backs up a seemingly random folder out of the list and not the whole lot (just shy of 14MB worth of files). I usually only get a couple of files. Anyone come across this before?