Never used the automacic orders for something like this.
I use the "Repeat" order a lot.
Just order the freighter(s) to load automine at X, unload automine at Y, type in a number (lets call it z) of your liking into the field right of the "Repeat" button (center-bottom F12 window) and hit that button. Every order that has been in the Plotted Move window, has now been repeated z times.