I know this is an old post but I have the same issue but only with the new X14 update. Interior dimensions only.
Every time I save and come back to the file all the dimensions change to the other side of the wall.
I do have surfaces turned on. All are measurements are done with the drywall on.
I really can't believe that not using interior and only use manual dimensions is the best answer I can find.
And our guys on the job will only look at the shown dimensions. I work in residential. There is know way anyone is going to scale a drawing themselves.
