I use control GridView (RadControls for WPF v2013.1.403.4 (Dev))
As source I bound ObservableCollection.
Sometimes after hard manupulating with data in my ObservableCollection I get duplicates in Grid rows.
In such case I can see that collection GridView.Items contains duplicates but in the same time ObservableCollection is ok.
DataLoadMode has default value (is it "Synchronous" ?).
I see topic with similar problem (http://www.telerik.com/community/forums/wpf/gridview/radgridview-duplicates-data-from-observablecollection.aspx
Please could you advice me which way I can fix my problem (may be it is fixed in new version of control).