I did not really appreciate the forward rotating tines on my Troy-bilt Super Bronco tiller until I attached a furrow blade to the rear. WITHOUT the blade I joked that it was well named as it would occasionally buck away even when the tines were set for 2 inch (5cm) depth multipass work. WITH the blade I get it, the forward rotating tines serve to drag the plow parts along. It kinda squats down into the pull and smooths out, any bucking only forcing the furrow blade forward through impediments. I like a reverse tiller for some things and wish mine was reversible, but only in some ways since that is just more complexity for mechanical repair and weight. Anyway if anyone ever wondered about reverse tillers vs forward tillers, the attachments come into the question.
This looks like one of those situations where I have to break down and read the manual. As a last resort, of course.
I took it upon myself to stop digging hillrows manually because I expanded the garden. I am sure the shovel will not get lonely.