Emiliano,
When you use the form buffer mode setting the row versus table setting is controlled by the controls used to show the data. A grid gives table buffering and any toher type of control gives row buffering. This leads you to have to figure out the buffer mode whenever you make any change to the form.
It is much better, and easier to work with, to use the BufferModeOverride property of each cursor in the DE than to use the form setting and then guess at what the buffer mode for any particular cursor might be at runtime.