When you've defined a Row Layout with Label position = Left (see attached file) it seems that:
ov.AllowColSizing = Infragistics.Win.UltraWinGrid.AllowColSizing.Free;
Is not working? 'Cause I can't size the Labels independantly from eachother...
The labels are not a column - they are inside the column. In other words, the column contains both the label and the cell. So this is the intended behavior.