World's slowest freight train, the Napoleon Defiance and Western

I began exploring the Napoleon Defiance and Western on Friday morning (13th October) starting near Woodburn, nothing was happening, I did see a rail road vehicle passing through Antwerp and quite a few freight cars parked on the "mainline" but no action as I worked my way north through Cecil, then Defiance, then Jewell and Okolona. I did keep seeing what appeared to be a boxcar parked on the track ahead in the far distance. That turned out to be the back of the second train moving very slowly.

So once I found them there were 2 trains moving north each with a GP20 on the front. The first has the repainted one in pioneer rail livery, the second was in the original Santa Fe livery. They were taking boxcars to the logistics facility in the north of Napoleon. There is a short siding there, long enough for one of the trains. It appears to work by the leading train pulls ahead of the siding, the second train engine then can run round it's train in the siding. The first train then pushes back to the second. The first train engine then moves out of the way on a spur. The second train engine then pushes all the cars to the end of the line.
After they had done this, they picked up a single boxcar from a spur on a different warehouse. The second train engine then headed back south. The first train engine had already left it's spur so was now in the lead southbound

You will also see that they has a GP9 already in one of the spurs and that was pulled out and left in front of the boxcars.
I came back on Monday morning, the GP9 was switching the boxcars brought up on Friday. The 2 GP20s were heading south with other boxcars.