Dhtmlx Rowspan problem

Im using dhtmlx3.6 Pro edition and I have a problem with rowspan functionality.

After load the data, I set a cell with rowspan=2 and that’s work OK, but after that if I add a row down of this column the data is bad created is “shifted”.Same problem with tree column with rowspan=2. When I load the childs the data is bad loaded. To replicate this I attach the example and the 2 xml loaded inside of the example.

Any doubts or comment please tell me.
Thanks in advance.
Baglieri Gonzalo Nicolas
example.zip (2.16 KB)

Unfortunately it’s not available to use the rowspan in a tree column.