Thank you for clearing the desired behavior.
By design in the RadGanttView control a GanttTask object can have any number of child GanttTask objects which respectively could have their own children tasks etc. This way you could achieve a multiple level of tasks structure. In order to separate (visually) each "level" of tasks the position (left offset) of the DataTemplate of each task is dynamically calculated in the source code of the control. Because this implementation is internal for the control changing it is not a simple task and has not been fully tested.
Currently we do not have an example project which demonstrates how to change this behavior of the nested tasks in the control. We will do our best to created such an example and add it to our SDK repository
located at GitHub.
If you have any other questions, let us know.
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