I created a sample to show my problem. I want an hierarchical grid to display, with each row in the first level expanded and all children populated. When the hierarchical grid is initially displayed this is what happens. If you click the Go button, the grid is destroyed and recreated. If you run in debug mode, you see all of the child grids populated and each first level row is expanded, but then when all child grids are populated all first level rows automatically collapse. Click Go again and the grid is populated as expected. Click again and the same problem occurs.

My real goal is to set the expandColWidth = 0 so that the hierarchical grid is fully populated but the user doesn't have to expand any columns manually. Unfortunately, when the grid automatically collapses there is no way to display the child grids.