Not sure if I'm doing something wrong, but I just started a new game and have this mod installed... and when I CTRL + Click Drag, it instantly puts the full amount into the first machine.

From the description:
"Start dragging OFF the first building."

I am dragging off of the first building and I'm having the same issue. It just puts everything in the first machine. It doesn't show the blue arrows on that first machine either, but the remainder (whatever is left after the first machine takes almost all of it) DOES get evenly distributed over the rest of the machines.

Edit: nevermind, "start dragging OFF the first building" apparently means "start dragging when you're NOT on a building, then drag over all of the buildings you want to distribute to," which is not really that obvious.