what its not tracking?
It is perfectly normal for the Keystep and Hermod to ‘disagree’ about pitch/voltage.
there is no standard in Eurorack for what pitch 0v represents. (partly because its relative to the oscillator tuning)
Hermod uses -5v to +5v for pitch, so Squarp chose C0=-5v C10=+5v , so C5=0v
(as default, so when root note 0v = 0)
Keystep chose to represent 0v at a different pitch - but its configurable in their software I believe.
what I think you’ve found is… Keystep is putting out much higher voltages e.g. C3=0v, and you have ‘tuned’ your oscillator to that, thus when you attach the hermod it appears to be low.
but the keystep voltage range is no more ‘right’ than the hermod.
note: sometimes I do set hermod root 0v = 12, so that C4 = 0v , but usually not as its all relative i.e. I tune by oscillators to what hermod is putting out.