Composite > Translate Step and number of inputs

Why when using Composite >Translate Step are the number of instances always 1 less than the number of inputs?

Seeing the same thing and also confused. It’s not 1 less though, one is on top of the fixed layer. Play with the rotation and you’ll see it. But I would expect the 1st one to be translated too. Anyone know why?

Been on my todo for a while to look at this. The behavior is correct. As you say, one of the first two inputs is the ‘fixed layer’. After that we start compositing the other layers onto it, and the first one will have no translate step applied, only the ones after that will start to have a translate step.
It makes more sense if your fixed layer is a larger canvas, and you are trying to place smaller images onto it