I just created a note with a table and indeed it seems that the extra space serves to accommodate the table controls.
But if you ask me, I don't think it makes any sense to ruin the entire note layout because of a simple element which in most cases is not used anyway.
Why not just indent the table in order to allow space for the controls or maybe move the controls to the right of the table where there should be plenty of space when the notes and left aligned?