Thanks for that, but there separate levers defintely marked RPM and Throttle. The throtlle levers were not all in same place but that is no doubt due to loss of motion in the linkages, but the pilot adjusted the throttles to a position, adjusted the mixture controls, then took a lot of tweaking of the RPM controls.
Yes I agree on the Dash 8 the change of propeller pitch is very noticable on landing, and taxi.