For the condition levers try the TOGGLE PROP FEATHER 1 and 2 or unbind anything you have mapped to the prop axis and then use the mouse.
I tried those, did not work. If you have to use the mouse for it to work, that seems like a bug to me and not intended use.
For the throttles decrease throttle used to work, have you calibrated the throttles in the EFB?
Included a pic of the EFB, throttles calibrated.