we use FixedHeaderIndicatorDefault="Button" for sorting, some columns will be un-editable with the Gainsboro color, some editable columns will be white color.

when we click the column header in the program for sorting, the clicked column will be moved to the first of the grid, the former columns will each move to the next, the strang thing is some of the columns color will changed to unexcepted one.

for example, there are A, B, C column in 1,2,3 place, A, C is Gainsboro, B is white, when click the C, it will move to the 1 place, and A, B will move to 2, 3 places,  however the A's color is white, B's color changed to Gainsboro

some of the displaylayout setting are as follows,

<DisplayLayout AllowColSizingDefault="Free" AllowColumnMovingDefault="OnClient"
                                    AllowDeleteDefault="Yes" AllowSortingDefault="OnClient" 
                                    AllowUpdateDefault="Yes" BorderCollapseDefault="Separate"
                                    HeaderClickActionDefault="SortMulti" Name="dgdTrimResponse"
                                    RowHeightDefault="20px" RowSelectorsDefault="No"
                                    SelectTypeRowDefault="Single" StationaryMargins="Header"
                                    StationaryMarginsOutlookGroupBy="True" TableLayout="Fixed" Version="4.00"
                                    AutoGenerateColumns="False" CellClickActionDefault="Edit"
                                    FixedHeaderIndicatorDefault="Button" UseFixedHeaders="True">