DataGridView first column,first row, is selected on Load, I don't want this

I had this same issue and nothing was working. The solution that worked for me was setting the 'Tabstop' property to False and calling the ClearSelection() method immediately after the data bind.

Event _MasterRowExpanded(object sender, CustomMasterRowEventArgs e)
GridView gv = (sender as GridView).GetDetailView(e.RowHandle, e.RelationIndex) as 
GridView;
gv.ClearSelection();