Importing the same items twice (

I want to report a problem that I encountered using the plugin. When I was trying to import the menus from the export file, it took time to import but the process was interrupted before the import process could finish importing, so I tried to import the file again.
What happened is that there were duplicate pages added to the same menu item.
I mean I had menu1 for example with two links referring to the same page, and another two links referring to another page. What if I was to import the file again? would the links for the pages in the menus triple?
You should check this out.