Hi Santiago,
The issue you're facing could also be resolution dependent. When multiple dimensions are placed in the rows/columns, priority is given to display the outer most dimension, and then the inner ones in order. For example:
One workaround you could try is to increase/decrease chart margins in the additional properties and place the chart itself within a container such as a panel or a grid to try and restrict it from expanding. This, again is resolution dependent.
I hope this helps for now. Keep a look out for 1.4.
Thanks and Regards,
Eshwar Prasanna