Thank you for writing.
RadListView uses RadListSource to store its items and the latter keeps track of the current item, thus the last added item is selected. You can easily deselect this item if you do not consider this functionality useful in your case:
There is a feature request for this functionality. Feel free to add your vote for it here: http://www.telerik.com/support/pits.aspx#/public/winforms/12335
I hope this helps.
the Telerik team