We have a grid that maps nested model properties. We have used the schema 'from' option exactly as outlined here: http://docs.telerik.com/kendo-ui/controls/data-management/grid/how-to/use-nested-model-properties
However this does not work properly if the grid is configured with incell editing. Instead of editing the variable at its original location (as specified by the 'from' option), the grid just creates new dummy variables on the target object with the same name as the schema field. Any edits are then stored into those dummy fields rather than to the original location.
Here is a dojo example that reproduces the issue: http://dojo.telerik.com/eLOpI
If you open the console there is a timer that logs the toJSON() content of the object in the grid. You can see the dummy variables that get created, and whenever you make edits to the object the dummy variables update, but the original nested ones don't.