That's exactly what I was trying to tell you.
You dragged the widget Pages three times. That widget shows all pages.
So, you're showing all pages three times, one for each widget you dragged over to the sidebar.
To do what you're trying to do, you have two options:
1. You do a custom menu (just below Appearance--->Widgets, you find Menus), and then drag the Custom Menu widget over to the sidebar.
2. Each time you drag the Pages widget, you exclude the page IDs you don't want to appear in that widget.
Perhaps the first solution might be easier.