I've been noticing some odd things with the throttle as well, but with a single throttle set-up. Full throttle would be full manifold and RPM for left engine, but reduced power on right engine (will post pictures soon, doing this from a laptop as I play now). I can still his WEP and all gauges move up to correct WEP settings. Both times I've noticed that my fuel was not on automatic, but set to LI, although I didn't do it. Once I switch back to automatic, problem seems resolved.
Except now when I move RPM, only the left gauge shows any change.
Did that make any sense?