I think that the Grid Assistant always reappears when the version of the Grid changed after an upgrade. It appears inside the grid control, but the grid is docked top while the assistant is docked fill, and so the grid assistant appears to be under the grid. You can right click in the section occupied by the grid and select to hide the grid assistant.
As for your other grid not showing up, there may have been an issue with your persistence during the update of your project. If we look in the code behind of the designer, in the InitializeComponent call, we see that grOrderLines is added to the collection of Controls, while grChildOrders is configured but not added to the Controls.
Imported from legacy forums. Posted by Diane [Xceed] (had 224 views)