I have a situation that when I add a column to my straight table it goes on the right side of the expression and no matter what I do I can't move it so it comes before (left to right) the expressions. I am including a screen shot - notice the "Policy Type" comn at the far right and no matter how try to drag it there is nothing I can do!
What is issue you are getting if you drag it to left??
just check if you have any hidden expresion.
then unhide them -> then drag Policy Type Dimension to Left
-> then againg hide the expression which you currently unhide it.