Fields inversion on production order

On the packing list form, when we go on a packing line, we have "Production lot" on the left side, with the button "Split in production lot" below, and the field "Tracking lot" is on the right side. That's the normal presentation.
On the production order form, when we go on a production line, these fields are inverted: we see the "Production lot" on the right side and the "Tracking lot" on the left, with button for splitting below it, which is disturbing for the user.